Two students use different methods to solve this multiplication problem: 1/2 • -4 4/5 Read each of their methods below and then enter numbers to correctly complete their work.
Answers
Answer:
-2 2/5
Step-by-step explanation:
Barbara's method:
[tex]\frac{1}{2}*-4\frac{4}{5}=\frac{1}{2}*\frac{-24}{5}=\frac{-12}{5}=-2\frac{2}{5}\\[/tex]
Christopher's method:
[tex]\frac{1}{2}*-4\frac{4}{5}=\frac{1}{2}*(-4+\frac{-4}{5})=\frac{1}{2}*-4+\frac{1}{2}*\frac{-4}{5}=-2+\frac{-2}{5}=-2\frac{2}{5}\\[/tex]
Related Questions
Plzzz help 11/10(-2x-1)-16
Answers
Answer:
[tex] - \frac{11}{5} x - \frac{171}{10} [/tex]Solution,
[tex] \frac{11}{10} ( - 2x - 1) - 16 \\ = \frac{11}{10} \times ( - 2x) - \frac{11}{10} \times 1 - 16 \\ = - \frac{22}{10} x - \frac{11}{10} - 16 \\ = - \frac{22}{10} x - \frac{171}{10} \\ = - \frac{11}{5} x - \frac{171}{10} [/tex]
Hope this helps...
Good luck on your assignment..
Answer:
-11/5x+-171/10
Step-by-step explanation: I believe its this answer unless you want it graphed
Can someone help? Two players take turns placing multiple chess kings on the cells of a 9×9 chess board, one king per move, so that the kings do not beat each other. (The color of a king piece does not matter.) The player who cannot make a move loses. Which player is the winner?
Answers
Answer:
the first player wins
Step-by-step explanation:
The first player can always win if they adopt this strategy:
1. make the first move in the center of the board
2. make every subsequent move in the position that is the image of the 2nd player's move, reflected across the center.
Hence if the 2nd player can make a move, so can the first.
Plz help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
12x-15
Step-by-step explanation:
In my expression, I multiplied 12(how much money she makes per hour) by x(the number of hours she worked) then subtracted 15, which was the fine she had to pay.
Answer:
12x-15
Step-by-step explanation:
I took the test
Find the area of the given shape
Answers
Answer:
100
Step-by-step explanation:
A rhombus is split into four right triangles
The base of one is 5 and the hypontenuse is 10
So remember x^2y^2=z^2
5^2=25
25+y^2=100
Ok so y is between 8 and 9 so lets just use 8 first
5*8*1/2=20
there are 4 triangles so 20*4=80
now same thing with 9
5*9*1/2=22.5
22.5*4=90
your answer is between 80 and 90
btw i might have gotten the answer wrong but idk if u were supposed to have an exact answer and also idk if the "10" was the hypontheses but since u were probably offline i answered it
Factor completely 2x2 − 2x − 40. 2(x − 5)(x + 4) (2x − 10)(x + 4) (x − 5)(2x + 8) 2(x − 4)(x + 5)
Answers
Answer:
[tex]2(x + 4)(x - 5)[/tex]
Step-by-step explanation:
Given
[tex]2x^2 - 2x - 40[/tex]
Required
Factorize
[tex]2x^2 - 2x - 40[/tex]
Start by expanding the above expression
[tex]2x^2 - 10x + 8x- 40[/tex]
Then, split the expanded expression into two
[tex](2x^2 - 10x) + (8x- 40)[/tex]
Factorize the split expression:
[tex]2x(x - 5) + 8(x- 5)[/tex]
[tex](2x + 8)(x - 5)[/tex]
Expand the expression in the first bracket
[tex](2x + 2*4)(x - 5)[/tex]
Then take out common factor
[tex]2(x + 4)(x - 5)[/tex]
From the list of given options, option A is correct
Answer:
A
Step-by-step explanation:
I took the test.
HELP A GIRLL OUT I GAVE YOU ALL MY POINTS!! HELPP! 1. a. What is James’s new texting speed if he practices for only 1 month? __________ b. What is James’s new texting speed if he practices for 2 months? ____________ c. What is his new texting speed if he practices for 3 months? _____________ 2. Write an algebraic equation that gives James’s texting speed s for m months of practice. 3. solve the equation from question 2 to determine how many months of practice it will take before james texting speed reaches 8 characters per second. Lynda would also like to complete in the same speed texting completion as james she currently texts at the rate of 4 characters per second but will only have 10 months to practice before the completion. 4. if Lynda wants to text at least 8 characters per second like james then the equation 10r+4=8 could be used to model this situation. Solve for r. 5. Explain what the variable r represents in the equation given in question 4. 6. Consider the equation 8x+5=37 write a real life scenario that this equation could model.
Answers
Answer:
1. a. His new texting speed after one month is 2 + 1/2 = 2.5 characters per second.
b. After two months it will be 2 + (1/2) * 2 = 3 characters / second.
c. Answer is 2 + 1/2 * 3 = 3.5 characters/second/.
2. The answer is s = 1/2m + 2
3. To solve for m we write 8 = 1/2m + 2 → 6 = 1/2m → m = 12 months.
4. 10r + 4 = 8 → 10r = 4 → r = 0.4
5. The variable r represents the rate she must increase her texting speed by per month.
6. A scenario could be "Allison has 37 marbles in a jar. She took out 5 from the jar and wants to divide the remaining amount equally among her 8 friends. How many marbles does each friend get?".
Please help solve i give brainliest
Answers
Answer:
(0,3)
Step-by-step explanation:
y = 2x+3
y = -3x+3
Since both equations are equal to y, set them equal to each other
2x+3 = -3x+3
Subtract 3 from each side
2x = -3x
Add 3x to each sdie
2x+3x = -3x+3x
5x =0
Divide by 5
x=0
Now solve for y
y =2x+3
y = 0+3
y=3
(0,3)
Answer:
(0,3)
Step-by-step explanation:
y = 2x+3
y = -3x+3
2x+3 = -3x+3
2x = -3x
2x+3x = -3x+3x
5x =0
x=0
The solve for y
y =2x+3
y = 0+3
y=3
(x,y)=(0,3)
Then (0,3) will be your answer!
Hope this help!
Determine the surface area of a sphere with a diameter of 16 cm. Question 4 options: A) 804.2 cm2 B) 1,024 cm2 C) 201.0 cm2 D) 3,216.9 cm2
Answers
Answer:
The answer is option A.
804.2cm²Step-by-step explanation:
Surface area of a sphere is 4πr²
where r is the radius
radius = diameter / 2
radius = 16/2 = 8cm
Surface area of the sphere is
4π (8)²
= 4(64)π
= 256π
= 804.2cm²
Hope this helps you.
The population (in millions) of a certain country can be approximated by the
function P(x) = 50(1.03)^x, where x is the number of years since 2000. In
which year will the population reach 100 million? Hint: An answer such as
2002.4 would represent the year 2002.
A. 2002
B. 2023
C. 2066
D. 2132
Answers
Answer:
B
Step-by-step explanation:
To answer this question, set the equation equal to 100 and solve for x. Thus:
[tex]100=50(1.03)^x[/tex]
[tex]2=(1.03)^x[/tex]
[tex]x=\log_{1.03}2\approx23.45\approx23[/tex]
Therefore, 23 years after 2000, the population will reach 100 million.
Hence, our answer is B, at the year 2023.
Answer:
B
Step-by-step explanation:
Please help me out I need it done ASAP
Answers
Answer:
B. 141 ft.
Step-by-step explanation:
Just saw this.
Which of the following equations describes the graph?
Answers
1/2x^2 - 2x +1
Step-by-step explanation:
it cannot be negative x as the parabola has a minimum value, the coordinates of turning point is (-1,2)
as it is -1 there has to be a negative sign in equation
so the right one is 2nd one
Answer:
Step-by-step explanation:
the graph is clearly that of a parabola that opens up and has its vertex at (2, -1). The coefficient of x^2 must be + because the parabola opens up.
Using the point-slope formula y - k = a(x - h)^2, and letting 2 replace h and -1 replace k, we get:
y + 1 = a(x - 2)^2 or y = a(x - 2)^2 - 1
Find the area of the triangle. ANSWERS: A) 84 m2 B) 66 m2 C) 42 m2 D) 132 m2
Answers
Answer:
C
Step-by-step explanation:
........
Answer:
42
Step-by-step explanation:
Area= 1/2(bh)
Area=1/2(12)(7)
Area=1/2)(84)
Area=42
pls help me with 15 and 16 I will make u brianlist thank u:)
Answers
Answer:
15. c
16. b
i hope you figure out later in life how to solve.
Answer:
A, D
Step-by-step explanation:
When you are writing an indirect proof, the first step is to temporarily assume that the opposite of what is given is true.
Because of this, that would mean that you would have to temporarily assume x>6, because the first step is to assume the wrong thing, making the answer A.
Same thing for number 16. It is giving you that n is an odd number, so you can temporarily say that n^2 is an even, since an odd times an odd it always going to equal an even, making the answer D.
State if a triangle is acute, obtuse, or right.
A) Obtuse
B)Acute
C)Right
ANSWER QUICK 10 POINTS!!
Answers
Answer:
acute
Step-by-step explanation:
Edward has a pile of marbles. If he counts by 3, there are 2 left. If he counts by 4, there are 3 left. If he counts by 5, there are 4 left. Let be the total number of marbles. If is between 170 and 190, what is the product of all digits of ?
Answers
Answer:this is stupid
Step-by-step explanation:who the hell does that
In a linear function, which of the following represents the average rate of change of the function? Slope y-intercept independent variable dependent variable
Answers
Answer:
the slope
Step-by-step explanation:
If the function is linear, the average rate of change of y with respect to x is the slope of the line.
Answer:
slope
Step-by-step explanation:
Please help me prove that AÊD = B
Answers
10) Spike drives for 50 miles at 60mph. He slows down and travels
another 50 miles at 40mph. For the final part of the 120 mile journey,
he speeds up to 80mph. How long does he take altogether? What is
his average speed (to the nearest mph)?
Answers
Answer:
2 1/3 hours or 2 hours 20 minutes.
51.4 mph to 1 decimal place.
Step-by-step explanation:
Time = distance speed
First 50 miles time taken = 50 / 60 = 5/6 hours
Second 50 miles - time = 50/40 = 5/4 hours.
Final 20 miles - time taken = 20 / 80 = 1/4 hours.
Total time taken = 5/6 + 5/4 + 1/4
= 5/6 + 6/4
= 10/12 + 18/12
= 28/12
= 7/3 or 2 1/3 hours or 2 hours 20 minutes.
Average speed = total distance / total time
= 120 / 7/3
= 120 * 3/7
= 51.4 mph to 1 decimal place.
I need help !!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
This is just comparing what is bigger, I don't see what's so hard about it.
Step-by-step explanation:
1. >
2.>
3.>
4.>
5.<
6.<
7.>
8.<
b.
1.>
2.<
3.>
4.<
5.>
6.>
7.>
8.>
2) a: > b: <
3) a: > b: >
4) a: > b: <
5) a: < b: >
6) a: < b: >
7) a: > b: >
8) a: < b: >
Which of the following is not a condition that must be met before you can use
the quadratic formula to find the solutions of an equation?
Answers
Answer:
D. The coefficient of the x^2-term must be positive.
Step-by-step explanation:
A. The coefficient of the x2-term can't be zero.
B. There can be no term whose degree is higher than 2.
C. One side of the equation must be zero.
D. The coefficient of the x2-term must be positive.
Quadratic equation is given as:
y=ax^2+bx+c
To use the quadratic formula,we have
ax^2+by+c=0
Coefficient of x^2 can not be equal to 0, that is a can not be equal to 0
There can be no term whose degree is higher than 2. The highest degree in a quadratic equation is 2
One side of the equation must be 0, that is ax^2+by+c=0
Coefficient of x^2 must be positive. The coefficient of x^2 can either be positive or negative. That is, it can either be a or -a
Plz help me-7.1(z-1.1)
Answers
Answer:
-7.1z +7.81Step by step explanation:
[tex] - 7.1(z - 1.1)[/tex]
Multiply each term in paranthesis by -7.1
[tex] - 7.1 \times z - 7.1 \times ( - 1.1)[/tex]
Multiply:
[tex] -7.1z + 7.81[/tex]
Hope this helps...
Good luck on your assignment..
If P(x)= x3 –x2+1, Then P(0)+P(1) =
Answers
Answer:
[tex]p(0) + p(1) = 2[/tex]
Step-by-step explanation:
=> [tex]p(x) = x^3-x^2+1[/tex]
Putting x = 0 in p(x)
=> [tex]p(0) = (0)^3-(0)^2+1[/tex]
=> [tex]p(0) = 0-0+1[/tex]
=> [tex]p(0) = 1[/tex]
Putting x = 1 in p(x)
=> [tex]p(1) = (1)^3-(1)^2+1[/tex]
=> [tex]p(1) = 1-1+1[/tex]
=> [tex]p(1) = 1[/tex]
So,
=> [tex]p(0)+p(1) = 1+ 1[/tex]
=> [tex]p(0) + p(1) = 2[/tex]
Algebra pls help me
Answers
Answer:
1). Y= x² -4x+6
Y = 3x-4
2) X= 5 and x= 2
3).
X= 5
Y= 11
X= 2
Y= 2
Step-by-step explanation:
1).
Y = (x-2)²+2
Y= x² -4x+4+2
Y= x² -4x+6
Y+4= 3x
Y = 3x-4
2).
Y = x² -4x+6
Y = 3x-4
x² -4x+6= 3x-4
X² -7x+10= 0
X²-5x-2x+10= 0
X(x-5)-2(x-5)= 0.
(X-5)(x-2)= 0
X= 5 and x= 2
3). substituting the value of x into the linear equation
Y = 3x-4
X= 5
Y= 3(5)-4
Y= 15-4
Y= 11
Y = 3x-4
X= 2
Y= 3(2)-4
Y= 6-4
Y= 2
Find the value of the trigonometric ratio, tan X.
Answers
Answer:
A. 24/7
What are sine, cosine, and tangent?
SOH - CAH - TOA
sine = opposite/hypotenuse
cosine = adjacent/hypotenuse
tangent = opposite/adjacent (that is not hypotenuse)
Step-by-step explanation:
tanX = ZY/XY = 48/14 = 24/7
Answer:
24/25
Step-by-step explanation: opposite side
The tangent of the angle X is tan X = ------------------------ = 48/50 = 24/25
adjacent side
WILL GIVE BRAINLIEST!!!!! The figure below shows a line graph and two shaded triangles that are similar Which statement about the slope of the line is true? It is 3 throughout the line. It is 1/3 throughout the line. The slope from point O to point A is 1/3 times the slope of the line from point A to point B. The slope from point O to point A is 3 times the slope of the line from point A to point B. (click on the picture below)
Answers
Answer:
The slope from point O to point A is 3 times the slope of the line from point A to point B.
Step-by-step explanation:
The slope of the entire line is 1. The slope from point A to point B is also 1. 1 multiplied by 3 is still 1, which means that the slope from point O to point A is also 1.
PLEASE ANSWER ASAPPPP I WILL GIVE BRAINLY!!!!!!!!!!!
Answers
Answer:
[tex]-\frac{7}{8}(-\frac{8}{7})x-\frac{3}{4}=20\left(-\frac{8}{7}\right)[/tex]
the last one
sorry for getting this wrong...............
Question 5 of 10
Solve the system of equations below by graphing both equations with a
pencil and paper. What is the solution?
y = 3x - 4
y=-2x+1
A: (0, -4)
B. (2, 2)
C. (3,5)
D. (1,-1)
Answers
Answer:
D.(1,-1)
Step-by-step explanation:
A positive plus a negative would be a negative but the negative number is less than the positive then you'll have to subtract them both
Answer:
D. 1, -1
Step-by-step explanation:
Trust me g
3/8 is 4 & 3/5 % of what number? (Round to the nearest hundredth.)
Answers
Answer:
n = 8.15
Step-by-step explanation:
3/8 is 4 & 3/5 % of what number?
Rewrite this as: 3/8 is (4 3/5)% of what number?
Convert 4 3/5% into a decimal: 0.046
Then write out and solve the equation 3/8 = 0.046n, where n is the unknown number.
Dividing both sides by 0.046, we get n = 8.15
The sum of two numbers is 88; one number is 12 less than the other. What is the larger number? 1. Cut the _______ number in half. Write both halves on your paper. 2. Cut the ______________in half. 3. Now ADD half and SUBTRACT half from each side.
Answers
Answer:
50
Step-by-step explanation:
I have set up an equation, where 'x' is the larger number:
x + (x - 12) = 88
Solve for 'x':
x + (x - 12) = 88
x + x - 12 = 88
2x - 12 = 88
2x -12 + 12 = 88 + 12
2x = 100
2x/2 = 100/2
x = 50
The larger number should be 50.
Answer:50
Step-by-step explanation:
In how many ways can we put six marbles in different colors into three jars? Note that the jars may be empty.
Answers
I’ve done this problem, what I wrote on my notebook was 3to the 6th power=729
Permutation helps us to know the number of ways an object can be arranged in a particular manner. The number of ways in which 6 marbles can be put in three different jars is 720.
What is Permutation?Permutation helps us to know the number of ways an object can be arranged in a particular manner. A permutation is denoted by 'P'.
[tex]^nP_r = \dfrac{n!}{(n-r)!}[/tex]
where,
n is the number of choices available,
r is the choices to be made.
Given that there are 6 marbles and 3 different jars. Therefore, The number of ways in which 6 marbles can be put in three different jars is,
Number of ways = ⁶P₃ × 3!
= 120 × 6
= 720
Hence, The number of ways in which 6 marbles can be put in three different jars is 720.
Learn more about Permutation:
https://brainly.com/question/11732255
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