If he had $5 left to put aside for bait, he start with $2.
Let 2x be amount of money Thomas started with.
He spent spent half of what he had plus $5 at the first store.
So the expression should be x + 5.
So, we have left money = 2x - (x+5)
Left Money = 2x - x - 5
Left Money = x - 5
he spent half of what was left plus $4 in second store.
So the expression should be = (x - 5)/2 + 4
Now he has left money = 2x - [(x - 5)/2 + 4]
left money = 2x - (x - 5)/2 - 4
After solving, we get
left money = 3x/2 - 3/2
left money = 3(x-1)/2
At the third store, he spent half of the remainder plus $3.
So the expression should be = \frac{3(x-1)/2}{2} + 3
Now he has left money = 2x - \frac{3(x-1)/2}{2} + 3
Now simplifying
Left Money = 2x - 3(x-1)/4 + 3
After solving we get;
Left money = 5x/4 + 15/4
Left money = (5x+15)/4
According to question, he had $5 left. So
(5x+15)/4 = 5
Multiply by 4 on both side, we get
(5x+15) = 20
Subtract 15 on both side, we get
5x = 5
Divide by 5 on both side, we get
x = 1
He start with money 2x = 2*1 = $2
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Annette is standing with a tree directly between her and a building. She stands so that, in her eyes, the
top of the tree appears to "touch" the top of the building. If the distance between her and the tree is
30 ft, the distance between the tree and the building is 15 ft, and the tree is 20 ft tall, how tall is the
building? (You may ignore her height.)
The height of the building is 30 feet.
How to find the height of the building?Annette is standing with a tree directly between her and a building. She stands so that, in her eyes, the top of the tree appears to "touch" the top of the building.
The distance between her and the tree is 30 ft, the distance between the tree and the building is 15 ft, and the tree is 20 ft tall.
Therefore, the height of the building can be calculated as follows:
The situation forms two right angle triangle.
Therefore, using similar triangle ratio,
20 / 30 = x / 45
where
x = height of the buildingHence,
45 × 20 = 30x
900 = 30x
x = 900 / 30
x = 30
Therefore,
height of the building = 30 ft
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What percent of the men surveyed shop online? Round your answer to the nearest whole number percent.
Mr. Rankin took his family out to dinner last night and their subtotal was $88.24. The sales tax was 5% and he left a 20% tip after the tax was added.
If Mr. Rankin put $120 on the table, how much change did he receive?
If Mr. Rankin put $120 on the table, the change he would receive $8.82
What is Percentage ?
Percentage can be defined as the product ratio of given value, total value and hundred.
Mr. Rankin took his family out to dinner last night and their subtotal was $88.24. The sales tax was 5% and he left a 20% tip after the tax was added.
If Mr. Rankin put $120 on the table, the change he would receive
tax = 5/100 * 88.24
tax = 4.412
tip = 20/100 * 88.24
tip = 17.648
Total amount = 88.24 +4.412+17.648
= 111.18
So, If Mr. Rankin put $120 on the table, the change he would receive
= 120 -111.18 = 8.82
Therefore, If Mr. Rankin put $120 on the table, the change he would receive $8.82
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write an algebraic expression for each verbal expression, then simplify indicating the properties used:
1. the product of 9 and t squared, increased by the sum of 2 and the square of t
2. 3 times the quantity of d squared plus r, minus 2 times the quantity of d squared plus r
An algebraic expression for each verbal expression, and simplified indication of the properties are
1. 10t² + 2
2. d² + 2r
What is meant by algebraic expression?Arithmetic operations including subtraction, addition, division, multiplication, and exponentiation are used to build any algebraic expression from a combination of variables and integers. The word can be either a variable, a number, or the result of multiplying a variable by a number and adding an exponent.
Mathematical formulas like 3x + 4 are examples of algebraic expressions. They are distinct from algebraic equations because they lack the equals sign (=). The mathematics curriculum and mathematics in general place a lot of emphasis on algebraic expressions.
1. 9t² + 2 + t²
= 10t² + 2
2. 3d² + r - 2d² + r
= 3d²- 2d² + r + r
= d² + 2r
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Use the screen shot- that has the question on it :)
Answer:
C
Step-by-step explanation:
This looks like a case of multiplying the number of X's by the respective number below it.
For example: the 1/2 has 3 X's, so we multiple (1/2)(3), making it (3/2) or 1.5
Next is the 1 having 2 X's, so (2)(1) is 2
Continuing that trend we get the following
1.5, 4, 2.5, and 3.
So all of our totals are 1.5, 2, 1.5, 4, 2.5, and 3.
Our last step will be adding all these answers together.
1.5 + 2 = 3.5
+ 1.5 = 6
+ 4 = 10
+ 2.5 = 12.5
and finally +3 = a grand total of 15.5 or 15 1/2
Adya makes 9/38 liters of soup for a party. The guests eat 3/57 liters. Use estimation to complete the statements below about Adya's soup.
the remaining soup at Adya's place is 24/114 liters As per the given ratio.
What is the ratio?The ratio can be defined as the number that can be used to represent one quantity as a percentage of another. Only when the two numbers in a ratio have the same unit can they be compared. Ratios are used to compare two objects.
Given, Adya makes 9/38 liters of soup for a party. The guests eat 3/57 liters.
Since the total soup was 9/38 liters
Thus,
Remaining soup at Adya = 9/38 -3/57
LCM of 38 and 57 are 114
Remaining soup at Adya = 27/114 - 6/114
Remaining soup at Adya = 27/114 liters
Therefore, the remaining soup at Adya's place is 24/114 liters.
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HURRY PLEASE!!!!!
Which statements about the factors of the terms in the expression 20 a + 15 a b + 24 b are true? Select three options.
Group of answer choices
a) The GCF of the expression is 1
b) The factors common to 20a and 24b are 1, 2, and 4.
c) The GCF of the expression is ab.
d) The factors common to 20a and 15ab are 1, 5, a, and b.
e) The factors common to 20a and 15ab are 1, 5, and a.
Answer: A, B, E
Step-by-step explanation:
For A:
None of the factors have one same factor they can be divided by besides 1.
For B:
Both 20a and 24b can be divisible by 1,2,4.
For E:
Both 20a and 15ab are divisible by 1,5 and a.
Pablo draws rectangle p he says that the area is greater than 50 square units what could the missing side length be
Any pair of positive numbers x and y that satisfy the inequality x * y > 50 will be the sides of rectangle.
If the area of rectangle P is greater than 50 square units, then the product of its length and width must be greater than 50. Let the length of the rectangle be x and the width be y. Then, we have:
x * y > 50
Since the missing side length is unknown, we cannot solve for a specific value. But we can say that any pair of positive numbers x and y that satisfy the inequality will represent a rectangle with an area greater than 50 square units.
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If you help you get a cookie :)
What operation is happening between this coefficient and variable?
4y
Responses
A DivisionDivision
B AdditionAddition
C MultiplicationMultiplication
D Subtraction
Answer: the answer is A SO WERE IS MY COOKIE :(
Step-by-step explanation:
What is the value of the expression below when y=3 y=3?
3 y^2 - 4 y + 8 3 y 2 − 4 y + 8
Answer:
When y = 3, we can substitute 3 for y in the expression 3 y^2 - 4 y + 8
3(3^2) - 4(3) + 8
= 3(9) - 12 + 8
= 27 - 12 + 8
= 15
Therefore, the value of the expression 3 y^2 - 4 y + 8 when y = 3 is 15.
Answer:
Basically since y = 3 we just have to remove the 'y' from the equation and replace it with the number 3. (Also pretty sure you wrote the equation twice)
Original Equation:
3 y^2 - 4 y + 8
Modified Equation:
→ 3 (3²) - 4(3) + 8
→ 3 (9) - 12 + 8
→ 27 - 12 + 8
→ 15 (answer)
Equation with 'y' included:
→ y (y²) - 4 (y) + 8
→ y (9) - 12 + 8
→ 27 - 12 + 8
→ 15 (answer)
A fast ferry takes 4 hours to cross a lake an average speed of
108 km/h. On a particular day, it traveled at an average speed
of 94 km/h for 4 hours. What was the remaining distance?
____km
Answer:
The remaining distance will be "56 km".
Step-by-step explanation:
Speed and Time:
The speed (s) of an object seems to be the rate at which it travels from one location to some other. It's also calculated by dividing the distance (d) traveled by the timeframe (t) or duration.
According to the question,
Average speed when cross a late, 108 km/h
On particular day, average speed 94 km/h
Time taken, 4 hours
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^^^^^^
not my work
where I found the answer
GIVING 50 POINTS!
The right triangle below has legs of length a=7 and b=10. The hypotenuse has length c.
(look at the image)
Part 1: compute the total combined area of the four triangles.
Part 2: Compute the area of the large (outer) square.
Part 3: Using your answers from parts 1 and 2, find the area of the small inner square.
Part 4: We are given the side lengths a=7 and b=10. Compute a²+b².
Part 5: use <, >, or = to complete the statement below.
Part 1
The area of one triangle is [tex](1/2)(7)(10)=35[/tex]. Multiplying this by 4 yields [tex]\boxed{140}[/tex].
Part 2
[tex](10+7)^2=\boxed{289}[/tex]
Part 3
[tex]289-140=\boxed{149}[/tex]
Part 4
[tex]10^2+7^2=\boxed{149}[/tex]
Part 5
The statement is missing.
1) The total combined area of the four triangles is: 140; 2) The area of the outer square is c² = c * c; 3) The area of the small inner square is: c² - 70; 4) The sum of the squares of the two legs of a right triangle is: 149.
How to solve the area problem?Part 1:
The area of each triangle is (a * b) / 2, so the total combined area of the four triangles is 4 * (a * b) / 2 = 2 * 7 * 10 / 2 = 70.
Part 2:
The side length of the outer square is c, the hypotenuse, so the area of the outer square is c² = c * c.
Part 3:
The area of the small inner square is the area of the outer square minus the total combined area of the four triangles, so it is c² - 2 * 7 * 10 / 2 = c² - 70.
Part 4:
The formula for the sum of the squares of the two legs of a right triangle is a² + b² = c², so a² + b² = 7² + 10² = 49 + 100 = 149.
Part 5:
c > a and c > b, so c > 7 and c > 10. Therefore, c must be the largest of the three values: a, b, and c.
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rationalize the denominator of $\displaystyle \frac{1}{\sqrt{2} \sqrt{3} \sqrt{7}}$, and write your answer in the form\[ \frac{a\sqrt{2} b\sqrt{3} c\sqrt{7} d\sqrt{e}}{f}, \]where everything is in simplest radical form and the fraction is in lowest terms, and $f$ is positive. what is $a b c d e f$?
The sum of a+b+c+d+e+f=57.
Apparently, you want to simplify: [tex]\frac{1}{\sqrt{2} +\sqrt{3} +\sqrt{7} }[/tex]
so the denominator is rational. It looks like the form you want is:
[tex]\frac{A\sqrt{2}+B\sqrt{3} +C\sqrt{7} +D\sqrt{E} }{F}[/tex]
And you want to know the sum A+B+C+D+E+F.
We can start by multiplying the numerator and denominator by a conjugate of the denominator. Then we can multiply the numerator and denominator by a conjugate of the resulting denominator.
[tex]\frac{1}{\sqrt{2} +\sqrt{3} +\sqrt{7}} .\frac{\sqrt{2} +\sqrt{3} -\sqrt{7}}{\sqrt{2} +\sqrt{3} -\sqrt{7}} =\frac{\sqrt{2} +\sqrt{3} -\sqrt{7}}{2\sqrt{6-2} } \\\\\\=\frac{\sqrt{2} +\sqrt{3} -\sqrt{7}}{2\sqrt{6} -2} .\frac{\sqrt{6}+1 }{\sqrt{6} +1} =\frac{(1+\sqrt{6} )(\sqrt{2} +\sqrt{3} -\sqrt{7})}{10} \\\\\\=\frac{\sqrt{2} +\sqrt{3} -\sqrt{7}+2\sqrt{3}+3\sqrt{2} -\sqrt{42} }{10} =\frac{4\sqrt{2} +3\sqrt{3} -\sqrt{7} -\sqrt{42} }{10}[/tex]
Comparing this to the desired form we have:
A = 4, B = 3, C = -1, D = -1, E = 42, F = 10
Then the sum is : A +B +C +D +E +F = 4 + 3 -1 -1 +42 +10 = 59 -2 = 57
The sum of interest is 57.
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are 1/2x + 3/4 - 5/8x - 7/8 and 1/8(x + 1) equivalent expressions? show your work help plss
Answer: No they are not.
Step-by-step explanation:
1/2x and -5/8x are like terms, if subtracted you get 1 1/8x. But then you are left with an unlike term, 3/4 so your first equation would equal out to 1 1/8x + 3/4
Now for equation 2, you use your distributive property and get 1/8(x)=1/8x
Then you must distribute 1/8(1)=1/8
1/8x + 1/8
So, 1 1/8x + 3/4 ≠ 1/8x + 1/8
a track star runs two races on a certain day. the probability that she wins the first race is 0.7, the probability that she wins the second race is 0.6, and the probability that she wins both races is 0.5. what is the probability that: note: define your events, and write the probability statement before you calculate an answer. you can show your work using equations or venn diagrams.
The probability that the track star wins at least one race is 0.8, the probability that she wins the first race but not the second is 0.2, and the probability that she wins the second race but not the first is 0.1
Let A be the event that the track star wins the first race, B be the event that the track star wins the second race.
The probability that the track star wins at least one race is: P(A U B) = P(A) + P(B) - P(A ∩ B)
The probability that the track star wins the first race but not the second race: P(A ∩ B') = P(A) - P(A ∩ B)
The probability that the track star wins the second race but not the first race: P(A' ∩ B) = P(B) - P(A ∩ B)
Given:
P(A) = 0.7
P(B) = 0.6
P(A ∩ B) = 0.5
P(A U B) = 0.7 + 0.6 - 0.5 = 0.8
P(A ∩ B') = 0.7 - 0.5 = 0.2
P(A' ∩ B) = 0.6 - 0.5 = 0.1
So the probability that the track star wins at least one race is 0.8, the probability that she wins the first race but not the second is 0.2, and the probability that she wins the second race but not the first is 0.1.
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Pyrotechnicians can use polynomials to plan complex fireworks displays. A firework is launched from a platform 6 feet above the ground at a speed of 200 feet per second. The firework has a 5-second fuse. The height of the firework in feet is given by the polynomial -16t² + 200t + 6, where t is the time in seconds. How high will the firework be when it explodes?
the fireworks will be 612 feet high when it explodes.
What is expression?Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.
Given, Pyrotechnicians can use polynomials to plan complex fireworks displays. A firework is launched from a platform 6 feet above the ground at a speed of 200 feet per second.
Expression that represents the height of firework = -16t² + 200t + 6
Since The firework has a 5-second fuse.
Thus, the firework will explode at t = 5
So, height at t= 5:
height of firework = -16 * 5² + 200*5 +6
height of firework = -16 * 25 + 1000 +6
height of firework = - 400 + 1000 + 6
Height of firework = 606
Since it started at 6 feet height
Thus total height at firework starts = 606 +6
total height at firework starts = 612
Therefore, the firework will explode at 612 feet in height.
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I dont understand what the question is, i need help
equations of the line in slope intercept form:
y = -2x - 3y =-1/2xWhat is Linear equation?A linear equation is an algebraic equation of the form y=mx+b, where m is the slope and b is the y-intercept, and only a constant and a first-order (linear) term are included. Sometimes, the aforementioned is referred to as a "linear equation of two variables," with y and x serving as the variables.
Given two linear function,
For first equation:
2x +y = -3
in slope intercept form
y = -2x - 3
For second equation:
Given second line passes through the origin
thus, equation of the line.
y = mx
where m is slope
m = (y₂ - y₁)/(x₂ - x₁)
in our case,
m = (0 -2)/(0-(-4))
m = -1/2
Thus, equation of second line;
y =-1/2x
Therefore, equations of the line in slope intercept form:
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A party rental company has chairs and tables for rent. The total cost to rent 3 chairs and 2 tables is $25. The total cost to rent 5 chairs and 6 tables is $65. What is the cost to rent each chair and each table?
The cost to rent each chair and table, based on the total cost to the party rental company, is:
Cost to rent chair = $ 2.50Cost to rent table = $ 8.75How to find the cost to rent the chairs and tables ?Let x be the cost of renting one chair and y be the cost of renting one table.
From the first piece of information given, we can write the equation:
3x + 2y = 25
From the second piece of information given, we can write the equation:
5x + 6y = 65
Solving these equations using elimination gives:
3x + 2y = 25
5x + 6y = 65
15x + 10y = 125
15x + 18y = 195
Subtracting gives:
0x + 8y = 70
y = $ 8.75
The cost to rent a chair is:
3x + 2 (8.75) = 25
3x + 17.5 = 25
3x = 7.5
x = $ 2.5
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At the movies, John was sent to the lobby to buy refreshments for his friends. Some wanted popcorn which sold for 50 cents a bag and others wanted caramel corn which was 75 cents a bag. If John bought 9 bags and spent $5.00, how many of each kind of bag did he buy?
If John bought 9 bags and spent $5.00, using simultaneous equations, the number of each kind of bag he bought is 7 bags of popcorn and 2 bags of caramel corn.
What are simultaneous equations?Simultaneous equations are two or more equations solved simultaneously or concurrently.
When two or more equations are solved at the same time, they are described as simultaneous equations or a system of equations.
The cost of popcorn per bag = $0.50
The cost of caramel corn per bag = $0.75
The total number of bags bought = 9
The total cost of the 9 bags = $5
Let the number of bags of popcorn = p and the number of caramel corn = c
Equations:0.5p + 0.75c = 5 ... Equation 1
p + c = 9 ... Equation 2
Multiply Equation 2 by 0.5:
0.5p + 0.5c = 4.5 ... Equation 3
Subtract Equation 3 from Equation 1:
0.5p + 0.75c = 5
-
0.5p + 0.5c = 4.5
0.25c = 0.5
c = 2
p = 9 - 2
= 7
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Consider the two equations below. Explain completely the similarities and differences in how you would solve each equation. Be clear and complete.
The first equation, 3^x = 12, is an exponential equation. To solve for x, we would take the logarithm of both sides with base 3:
x = log3(12)
The second equation, x^3 = 12, is a polynomial equation of degree 3. To solve for x, we would take the cube root of both sides:
x = ∛12
How does the equation compare?The similarity between these two equations is that both are equations with one variable and are looking for the value of that variable.
The main difference between these two equations is the type of function they represent. The first equation is an exponential function, represented by 3^x, while the second equation is a polynomial function, represented by x^3.
As a result, the methods used to solve these equations are also different. The first equation is solved by taking the logarithm of both sides and the second equation is solved by taking the cube root of both sides.
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Suppose Nigel has a bag of colored wristbands,
and he chooses one without looking. The bag
contains a total of
25 wristbands and 6 of
the wristbands are blue.
What is the probability that he will choose a blue wristband
The probability that he will choose a blue wristband is 6/25.
Probability is a method to know how likely something is going to happen. Whenever we're uncertain about the outcome of an event, we can talk about the probabilities of certain outcomes. The analysis of events overseen by probability is called statistics.
Total number of wristbands = 25
Number of blue colour wristbands = 6
As we know, the formula of experimental probability is
Probability of an Event P(E) = Total Number of times an event occurs/Total number of trials.
Number of blue colour wristbands = 6
Total number of wristbands = 25
∴ Probability of an Event P(Blue) = 6/25
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If the domain of f(x) is -3 ≤ x ≤ 9 and the range of f(x) is 2 ≤ y ≤ 15, then which of the following
statements is correct about the domain and range of 9 (x) = f(x-2) - 8?
"The domain of 9(x) = f(x-2) - 8 is -3 ≤ x ≤ 9 and the range is -6 ≤ y ≤ 7" is correct.
What is the Domain and Range of the function?
The domain of a function is the set of all input values (x-values) for which the function is defined. It is the set of all values of x for which the function is defined.
The range of a function is the set of all output values (y-values) that the function can produce. It is the set of all possible values that the function can take on.
The domain of a function is the set of all input values (x-values) for which the function is defined. The range of a function is the set of all output values (y-values) that the function can produce.
When we shift a function horizontally, the domain remains unchanged, but the range will change. In the case of a shift of -2, the domain of f(x) is still -3≤x≤9
For 9(x) = f(x-2) - 8, it means that we are taking the output of f(x-2) and subtracting 8 from it. So, the range of 9(x) will be (2-8) ≤ y ≤ (15-8) = -6 ≤ y ≤ 7.
In summary,
The domain of 9(x) = f(x-2) - 8 is -3 ≤ x ≤ 9
The range of 9(x) = f(x-2) - 8 is -6 ≤ y ≤ 7
Hence, statement "The domain of 9(x) = f(x-2) - 8 is -3 ≤ x ≤ 9 and the range is -6 ≤ y ≤ 7" is correct.
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What is the equation of the line that passes through the point (-3,4) and has a slope of 2/3?
Answer:
y = 2/3x + 6
Step-by-step explanation:
for this problem, we need to find the value of b (the y-intercept). to do so, all we have to do is plug in the x and y values of the given ordered pair into the x and y values of the function. this will give us:
[tex]4=\frac{2}{3}(-3)+b[/tex]
solve for b and we get 6.
so, our slope-intercept equation is [tex]y=\frac{2}{3}x +6[/tex] .
hope this helped, good luck!
Helpppp
could somebody help me with the following question?
Answer: y = -4x -2
Step-by-step explanation:
For a linear equation, we can use this formula:
y - y_1 = m(x - x_1)
We have the slope and the coordinates, so we can just plug everything in:
y - 14 = -4( x + 4)
y - 14 = -4x -16
y = -4x -2
All the information is in the picture help please
That X, w, and Z w are related we demonstrate that these are identical.
What is congruence of angle?This makes a right triangle with segment y V as the opposite side, and we once more know that X Y and segment y Z are perpendicular. The reason why these Arkan wrote them this time is because, in my mind, they are nooses of similar triangles on the triangles, X, y v um, and our other triangle will be a Z y V. Finally, we wish to demonstrate the congruence of angle visi w with angle v X w, which will be right here. So, it's a little difficult to establish this one in this instance. However, in essence, because we have previously established that X, w, and Z w are related we demonstrate that these are identical. Additionally, we demonstrated that the Zeevi Arkin Group and XVI, which border on the last side, will both inform us that our angles are same. Therefore, given that we have previously established certain elements,
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1. A TV has a width of 45 inches and a height of 30
inches. What is the length of the diagonal of the TV?
A TV has a width of 45 inches and a height of 30inches the length of the diagonal of the TV is 54.08inches.
What is Rectangle?
A rectangle is a quadrilateral with four right angles in the Euclidean plane. It can alternatively be described as a parallelogram with a right angle or an equiangular quadrilateral, where equiangular denotes that all of its angles are equal. A square is a rectangle with four equally long sides.
Make a diagonal and a rectangle. Two parallel triangles appear. Pay attention to one of the triangles.
We have a right triangle with a = 45 and b = 30
we have to find the c = ?
Let's find b using the Pythagorean Theorem;
a^2 + b^2 = c^2
45^2 + 30^2 = c^2
2025 + 900 = c^2
2925 = c^2
c = 54.08 inches
Therefore,the diagonal of the TV is 54.08inches.
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The line inside this circle is its
A)
radius
B)
center
C)
diameter
D)
circumference
The line inside the circle depicted in the figure is radius.
A circle is defined as the round shape lacking corners and line. However, it does comprise of all the points in a plane. The center of the circle is the middle point which is equidistant from the outer surface of the circle. The outer surface or boundary of circle is called circumference.
A line joining the centre of the circle with circumference is called radius and the same is exhibited in the adjoining figure. A line that passes through the centre of the circle and touches the circumference at two ends is called diameter. Diameter is double in size to the radius.
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The complete question is attached in the figure.
Simplify
The following expression.
6 1/1 ÷ 6 91/10
A. 18
B. 1/126
C. 216
D. 1/18
A mathematical expression is a phrase that has a minimum of two numbers or variables and at least one mathematical operation.
Explain about the Expression?A term may be a number, a variable, the product of two or more variables, a number and a variable, or any combination of these. A single term or a collection of phrases can be used to create an algebraic expression. For instance, 4x and y are the two terms in the formula 4x + y.
Expressions that use numbers to perform operations. An example of a numerical expression is 2(3 + 8). At least one variable and one operation must be present in an algebraic expression (addition, subtraction, multiplication, division). One such algebraic expression is 2(x + 8y).
The following elements can be used to determine the algebraic expressions: a single variable or a group of related variables.
= 6/6 /546/60
=1 / 9.1
=0.109
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Two circle of radii 8cm with centre p and q are given the chord AB of circle with centre P and the chord CD of the circle with centre Q are equal if angle PAB=40 then find angle CQD
The angle PAB is given as 40 degrees so we can use the sine rule to calculate the lengths of the chords is CQD = 17.7 degrees.
The sine rule states that the ratio of the length of a side of a triangle to the sine of its opposite angle is equal to the ratio of any other side to the sine of its opposite angle.
Let us denote the length of chord AB by x and the length of chord CD by y.
Therefore x/sin 40 = y/sin (180-40)
=> x/0.766 = y/0.939
=> x = 0.766*0.939 = 0.723
y = 0.939*0.766 = 0.723
Since AB=CD, x=y=0.723.
We can now use the cosine rule to calculate the angle CQD.
The cosine rule states that the square of the length of a side of a triangle is equal to the sum of the squares of the other two sides minus twice the product of the other two sides times the cosine of the included angle.
Therefore CQ^2 = 8^2 + 8^2 - 2(8^2)cosCQD
=> CQ^2 = 64 - 64cosCQD
=> 64 - 64cosCQD = 0.723^2
=> 64 - 64cosCQD = 0.521
=> 64cosCQD = 63.479
=> cosCQD = 63.479/64
=> cosCQD = 0.988
Therefore CQD = cos^-1(0.988)
=> CQD = 17.7 degrees.
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Translate each verbal description into an algebraic expression. Simplify the expression when you can. 120% of 5x
120% can be expressed as a decimal by dividing it by 100: 120 / 100 = 1.2 So, 120% of 5x can be expressed as: 1.2 * 5x = 6x The expression simplifies to 6x.
What is algebraic expression?Algebraic expressions are the idea of expressing numbers using letters or alphabets without specifying their actual values. The basics of algebra taught us how to express an unknown value using letters such as x, y, z, etc. These letters are called here as variables. An algebraic expression can be a combination of both variables and constants. Any value that is placed before and multiplied by a variable is a coefficient. An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc.).These expressions are represented with the help of unknown variables, constants and coefficients. The combination of these three (as terms) is said to be an expression.
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