Both Guillermo's and Cara's solutions are incorrect due to the incorrect substitution of values of a variable to find the dependent one.
Guillermo's solution is incorrect because he did not substitute the value of 'b' from the first equation into the second equation. Instead, he directly added 0.49b to both sides and solved for a, which gives an incorrect result.
Cara's solution is also incorrect because she did not substitute the value of 'a' from the first equation into the second equation. Instead, she used the equation a + b = 7 to solve for the value of b, which gave her an incorrect result.
We can find the correct solution as follows -
The system of equations is,
⇒ a + b = 7 .. (i)
And 1.29a + 0.49b = 6.63 .. (ii)
Now, we will solve the system of equations as follows -
⇒ a + b = 7
⇒ a = 7 - b .. (i)
And, ⇒ 1.29a + 0.49b = 6.63 .. (ii)
Substitute the value of a from (i) in (ii), we get;
⇒ 1.29a + 0.49b = 6.63
⇒ 1.29(7 - b) + 0.49b = 6.63
⇒ 9.03 - 1.29b + 0.49b = 6.63
⇒ - 0.8b = 6.63 - 9.03
⇒ - 0.8b = - 2.4
⇒ 0.8b = 2.4
⇒ b = 2.4 / 0.8
⇒ b = 3
And, From (i);
⇒ a = 7 - b .. (i)
⇒ a = 7 - 3
⇒ a = 4
Hence, 4 pounds of apples and 3 pounds of bananas were bought.
Thus, both of their solutions are incorrect.
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The complete question is -
FIND THE ERROR In the system a + b = 7 and 1.29a + 0.49b = 6.63, a represents pounds of apples and b represents pounds of bananas a person bought. Guillermo and Cara are finding and interpreting the solution. Is either correct? Explain your reasoning.
a. Guillermo: 1.29a + 0.49b = 6.63 ⇒ 1.29a +0.49(a + 7) = 6.63 ⇒ 1.29a + 0.49a + 3.43 = 6.63 ⇒ 1.78a = 3.2 ⇒ a = 1.8
a + b = 7, so b = 5.2. The solution (1.8, 5.2) means that 1.8 pounds of apples and 5.2 pounds of bananas were bought.
b. Cara: 1.29a + 0.49b = 6.63 ⇒ 1.29(7-b) + 0.49b = 6.63 ⇒ 9.03- 1.29b + 0.49b = 6.63 ⇒ -0.8b = -2.4 ⇒ b=3
The solution b = 3 means that 3 pounds of apples and 3 pounds of bananas were bought. volunteers. The ratio of boys to girls is 7:5.
Solve pleaaase i really need help
The equation of the model is (b) 2x = 5
How to determine the equation of the model?From the question, we have the following parameters that can be used in our computation:
Left = x x
Right hand side = 1 1 1 1 1
The above parameters mean that
Left = 2x
Right = 5
When represented as an equation, we have
2x = 5
Hence, the equation is (b)
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The triangle below is equilateral. Find the length of side x to the nearest tenth.
x
12
Answer:
Step-by-step explanation:
The function f(x) is shown on the graph.
f(x)
O Logarithmic
B 7
O Polynomial
654
-10-9-8-7-6-5-4-3-2-10
3
2
-1
-2
-3
47999
-7
-10
Which type of function describes f(x)?
O Exponential
X
2 3 4 5 6 7 8 9 10
An exponential function is represented by taking into account the fact that the graph has an asymptote and does not cross it.
What is exponential function?A function with the formula f(x)=ax is an exponential function. Here, x is the input and an is a positive, real integer (referred to as the base) (independent variable). The independent variable is always in the exponent for exponential functions, which is important to keep in mind.
It is based on:
where a represents the y-intercept.
The rate of change is b.
The asymptote, which the function does not cross, is y = c.
Consequently, the graph in this issue models an exponential function with an asymptote at y = 0.
An exponential function is represented by taking into account the fact that the graph has an asymptote and does not cross it.
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The growth rate of a bacterial culture is 150% each hour. Initially, there are 10 bacteria. Describe the error in finding the number of bacteria in the culture after 8 hours. Correct the error and find, to the nearest whole number, the number of bacteria in the culture after 8 hours. The exponential function is b(t)=. After 8 hours, there are about bacteria in the culture
If the growth rate of bacterial culture is 150% each hour , then the correct exponential function is b(t) = 10(2.5)^t instead of b(t) = 10(1.5)^t , and after 8 hours there are about 15259 bacteria in culture .
The percent growth in the bacterial culture is = 150% = 1.5 ;
the initial amount of bacteria present is = 10 ;
the exponential function used to denote this situation is written as :
⇒ b(t) = 10(1 + 1.5)^t
⇒ b(t) = 10(2.5)^t
to find number of bacteria after 8 hours ,
we substitute t = 8 in b(t) ;
we get ;
⇒ b(8) = 10(2.5)⁸ ;
⇒ b(8) = 15258.789 ≈ 15259
Therefore , there will be 15259 bacteria present after 8 hours .
The given question is incomplete , the complete question is
The growth rate of a bacterial culture is 150% each hour. Initially, there are 10 bacteria. Describe the error in the data below, in finding the number of bacteria in the culture after 8 hours. Correct the error and find, to the nearest whole number,
"The number of bacteria in the culture after 8 hours. The exponential function is b(t) = 10(1.5)^t , b(8) = 10(1.5)⁸ . After 8 hours, there are about 256 bacteria in the culture ."
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Evaluate the expression for the given value of the variables.
0.5c−2.3d
c=15, d=3
DUE IN 20 MIN
Answer:
I got 0.6
Step-by-step explanation:
plug in c and d
0.5(15) - 2.3(3)
multiply them
7.5 - 6.9 = 0.6
An airplane takes off from the airport. After 2 minutes the plane is at 500 ft. Assume the plane continues at the same rate. The plane’s height and minutes above the ground are related to each other.
A. Write an equation for the situation.
An equation for the situation described above is h = 2m + 500.
How to write an equation to model this situation?In order to write an algebraic equation that model this situation, we would assign a variable to the number of minutes after an airplane takes off from the airport and the plane’s height respectively, and then translate the word problem into algebraic equation as follows:
Let the variable m represent the number of minutes.Let the variable h represent the plane’s height.Next, we would translate the word problem into an algebraic equation based on the fact that after 2 minutes the plane is at 500 feet as follows;
h = 2m + 500.
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PLEASE HURRY I HAVE LIMITED TIME!
Question- Find the standard form equation of a circle given a center of (7, 14) and a point on the circle of (4, 15).
Answers-
A.(x-7)^2 + ( y-14)^2 = 10
B.(x-7)^2 + (y-14)^2 = 15
C.(x-7)^2 + (y-14)^2 = 25
D.(x+7)^2 + (y+14)^2 = 2
Answer:
A
Step-by-step explanation:
R = sqrt((7-4)^2+(14-15)^2)=sqrt(10)
The answer is A since that's the only answer with the proper radius, using the formula for a circle.
Macy made a 220 grooming dogs one day in her mobile grooming business she charges 60 per appointment and 40 earned in tips write an equation to represent the situation and solve the equation to determine how many appointments Messi had part B Logan made a profit of 300 as a mobile groomer he charge $70 per appointment and received $50 in tips but he had to pay a rental fee for the truck of $20 per appointment write an equation to represent the situation and solve the situation to determine how many appointments Logan had
Macy had 3 appointments.
Logan had 5 appointments.
What is the quadratic equation?
A quadratic equation is a type of polynomial equation of degree 2, which is written in the form of "ax^2 + bx + c = 0", where x is the variable and a, b, and c are constants. The solutions to a quadratic equation can be found using the quadratic formula: x = (-b ± √(b^2 - 4ac))/2a.
Part A:
Let x be the number of appointments Macy had.
We know that the total income (60x + 40) must equal 220.
Therefore, the equation representing the situation is:
60x + 40 = 220
To solve for x, we can subtract 40 from both sides:
60x = 180
Finally, we divide both sides by 60 to get:
x = 3
Macy had 3 appointments.
Part B:
Let y be the number of appointments Logan had.
We know that the total profit (70y + 50 - 20y) must equal 300.
Therefore, the equation representing the situation is:
50y + 50 = 300
To solve for y, we can subtract 50 from both sides:
50y = 250
Finally, we divide both sides by 50 to get:
y = 5
Logan had 5 appointments.
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how many 9-digit integers contain exactly 5 zeroes? (recall that the leading digit is never zero! you may enter a formula or an exact numerical value.)
Considering that the leading digit is never zero , then the number of 9 digit integers that can contain exactly 5 zeroes are 367416 numbers .
the number of digits in the number is = 9 digits ;
the number should have exactly five zeroes ,
the number of ways to pick five of the digit positions for the zeroes, since the first digit can’t be zero is = ⁸C₅ ,
There are 9 possible digits for each of other 4 positions as other positions are occupied by 0 ,
So, the total number of possibilities is = ⁸C₅ × 9⁹⁻⁵
Simplifying further ,
we have ,
= ⁸C₅ × 9⁴
= 56 × 6561
= 367416 numbers .
Therefore , there can be 367416 numbers of 9 digits having 5 zeros .
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5. while performing a starch test on several different cookie brands, four tests result in the typical black color of starch presence, but the fifth gives a yellow-brown color. how might you interpret this result?
Starch and protein levels are checked for In order to present the idea of chemical compound variety, it is necessary to test for the presence of starches and protein macromolecules.
Hypothesis: It is a negative result if the biuret reagent remains blue after a test for protein since the reagent itself is blue. The test for protein is positive if a solution is pinkish purple or purple. The starch test solution is a yellowish brown color. We utilized iodine to test for starch in some solutions if any ingredient produced a mixture that was yellowish brown in color. Polysaccharides, monosaccharides, and disaccharides are separated from starch by iodine. Iodine interacts with molecules, changing the color of the molecules, while starch is a coiled polymer of glucose.
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free bilirubin is transported by the blood to the liver. TRUE OR FALSE
True, free bilirubin is transported by the blood to the liver.
Macrophages begin the disposal of hemoglobin by separating the heme from the globin. They hydrolyze the globin into free amino acids, which can be used for energy-releasing catabolism or recycled for protein synthesis.
Bilirubin
Bilirubin is a red-orange compound that occurs in the normal catabolic pathway that breaks down heme in vertebrates. This catabolism is a necessary process in the body's clearance of waste products that arise from the destruction of aged or abnormal red blood cells.
Hemoglobin
Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs.
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Can someone help me please?
Answer:
Part A.) 153 Boxes
Part B.) 394 Boxes (395 if rounding up)
Step-by-step explanation:
The inequality used in this situation would be:
3.74x + 25 < 600
3.74 is the price of each box
x is the number of boxes
25 is that deposit
and < 600 is not making $600 in sales
What we need to do is get X alone. First we will subtract 25 from both sides since that's the opposite of +25.
Doing that will get you
3.74x = 575
Next step is to divide 3.74 on both sides since 3.74 is being multiplied by x and division is the opposite.
That will give you X = 153.74. We round down to stay under and we end up with 153.
For part B, we would do the same process, but instead of < 600, we would do >= 1500. Just typing the same steps out.
3.74x >= 1475 since we subtract 25 from both sides
x = 394.38 since we divide 3.74 on both sides. Rounding would get us 394
a factory (f) is producing smoke that causes damage of $80 per month to a local residents laundry (l). the damage can be eliminated in one of two ways:
The following two methods can be used for eliminating the damage to the laundry (l).
Factory (f) can install a scrubber at a cost of $500 to reduce the smoke, thereby eliminating the damage to the laundry (l).Local resident (l) can purchase and install a clothesline at a cost of $100, thereby eliminating the damage to their laundry.The factory and the local resident must decide whether to install the scrubber or the clothesline, depending on which option will result in the lowest cost. The best option for each party depends on their own willingness to pay for the damage reduction and their ability to pay for the solution.
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Assume that when adults with smartphones are randomly selected, 37% use them in meetings or classes. If 30 adult smartphone users are randomly selected, find the probability that exactly 19 of them use their smartphones in meeting or classes the probability is (Round to four decimal places as needed.
The probability of adults using smartphones in meetings or classes as per the randomly selected adults is equal to 0.3375.
Percent of randomly selected adults use smartphones in meetings or classes represents the probability of success 'p' = 37%
= 0.37
1 - p = 1 - 0.37
= 0.63
Number of randomly selected adults use smartphone in meetings or classes represents sample size 'n' = 30
Exactly 19 adults use smartphone represented by x
x = 19
Using binomial distribution :
Required probability is :
P(x) = ⁿCₓ× pˣ × ( 1 - p )ⁿ⁻ˣ
⇒P(x) = [ n! / x! (n - x)! ] × pˣ × ( 1 - p )ⁿ⁻ˣ
Substitute the values
⇒P(19) = [ 30! / 19! (30 - 19)! ] × 0.37¹⁹× ( 0.63 )³⁰⁻¹⁹
⇒P(19) = ( 30!/19! ×11! ) × 0.37¹⁹× ( 0.63 )¹¹
⇒P(19 ) = 0.3375
Therefore, the required probability of selecting exactly 19 adults who use their smartphones in meetings or classes is equal to 0.3375.
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One company estimates same-day delivery as more than three less than half the total number of miles which graph represents the overall equation represented by the scenario or points may not apply to the scenario note that the graphs have similar miles for the independent variable on the X axis and the Y axis is a unit of time dependent on the number of miles
A graph that represents the overall equation represented by this scenario is shown in the image attached below.
How to determine the graph?Based on the information provided about this company with respect to its same-day delivery and total number of miles to be covered, we would assign variables to the parameters as follows:
Let the variable x represent be the total number of miles.Let the variable y represent same-day delivery.Next, we would translate the word problem into an algebraic equation by using an inequality:
Half the total number of miles = x/2.
y > x/2 - 3
Furthermore, we would determine the x- and y-intercepts as follows:
When x = 0, we have;
y = 0/2 - 3
y = -3.
Therefore, y-intercept = (0, -3).
For the x-intercept (y = 0), we have:
0 = x/2 - 3
x/2 = 3
x = 6.
Therefore, x-intercept = (6, 0).
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6x−10y=-40 in slope intercept form
Need Help ASAP!!!! 15 POINTS
Using Quadratic formula, the roots of the equation are -11 + √217/6, -11 - √217/6 .
Equations involving quadratics The definition of a quadratic as a second-degree polynomial equation demands that at least one squared term must be included. It also goes by the name quadratic equations. The quadratic equation has the general form ax2 + bx + c = 0.
Any quadratic problem can be solved using the quadratic formula. The equation is first changed to have the form ax2+bx+c=0, where a, b, and c are coefficients. After that, we enter these coefficients into the following formula: (-b(b2-4ac))/(2a).
Using Quadratic formula,
3x² + 11x - 8
(-b±√(b²-4ac))/(2a)
⇒ (-11 ± √11² - 4(3)(-8)/2(3))
⇒ -11 ± √217 / 6
⇒ -11 + √217/6, -11 - √217/6
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Find the mean, median, mode, and range for each data set given.
a. 7, 12, 1, 7, 6, 5, 11
b. 85, 105, 95, 90, 115
c.15, 11, 11, 16, 16, 9
Answer:
Answers are in bold
Data set A:
Mean: 7
Median: 7
Mode: 7
Range: 11
Data set B:
Mean: 78
Median: 95
Mode: No mode or all the numbers (85, 105, 95, 90, 115)
Range: 30
Data set C:
Mean: 13
Median: 13
Mode: 11 and 16
Range: 7
Step-by-step explanation:
You're welcome.
Week 23-Practice 19: Surface Area (PA.GM.2.1 & PA.GM.2
A cylinder has a surface area of 48 cm² and a radius of 2 cm. What is the height of the cylinder?
O 8 cm
O 10 cm
O 12 cm
O 14 cm
The lateral surface area of the cylinder is 51.22 cm2.
What is surface area?
Surface area is a two-dimensional measure that refers to the total area of a surface, such as the area of a two-dimensional shape, a three-dimensional solid, or a combination of both. It is the sum of the areas of all the faces of a solid object. It is also referred to as the area of the boundary of a three-dimensional object. It can be used to calculate the volume of an object, and is also used in other calculations like area of the base of a triangle, area of a circle, and more.
The cylinder shown below has a diameter of 5.2 cm on the base and a height of 7.1 cm. The diameter of the base is referred to as 'd' and the height of the cylinder is referred to as 'h'. The lateral surface area of the cylinder can be found by using the formula LSA = 2πrh, where 'r' is the radius of the base. The radius of the base of this cylinder is half of the diameter, or 2.6 cm. Therefore, the lateral surface area of the cylinder is: 2π x 2.6 x 7.1 = 51.22 cm2.
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The supermarket has 20 aisles. 10 of the aisles are empty. What percentage of the aisles are empty?
The percentage of the aisles that are empty, given the number of aisles in total in the supermarket, is 50 %
How to find the percentage of aisles ?To find the percentage of the aisles that are empty, you can use the formula :
= Number of aisles that are empty / Number of total aisles in the supermarket x 100 %
Number of aisles that are empty = 10 aisles
Number of total aisles in the supermarket = 20 aisles
The percentage of aisles empty is:
= 10 / 20 x 100 %
= 0. 5 x 100 %
= 50 %
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Please help will give brainliest
Write a letter to a student who will be taking this math class next year and give them some advice about this class
A letter to a student who will be taking this math class next year to give them some advice about this class has been written below.
(Sender's address)
20/01/2023
Dearest,
I was happy to see your letter, and I hope this letter finds you in the best of health. I have wanted to go on a trip with you for a long time but I guess that would happen later since you have to start attending classes soon.
I have a list of things to keep in mind when you start your classes. I was always too scared of mathematics, and I know you are too, but I have always wanted to tell you how fruitful it is to learn a subject that will help you in every field you want to go in. Let me know what you think about it after you finish reading this letter. I know it is no secret that maths is a difficult subject but you can master it if you keep what I am going to tell you in mind. Practice your concepts daily. Keep brushing up on whatever your teacher teaches you. Remember the formulas and you will know how to answer any question. I know for sure that it is going to be worth it too.
I will make sure that I meet you next weekend so that we can meet before you begin the classes. If you try hard, you can make this work. See you soon.
Love,
(Sender's name)
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Jacob has 6. 15 meters of rope. He is going to use 1. 2 meters of rope to tie up his boat. How many centimeters of rope does he have left?
The remaining rope he left is 495cm
Now, According to the question:
Multiplication is an operation that represents the basic idea of repeated addition of the same number. The numbers that are multiplied are called the factors and the result that is obtained after the multiplication of two or more numbers is known as the product of those numbers.
Jacob has 6. 15 meters of rope.
He is going to use 1. 2 meters of rope to tie up his boat.
When you do the subtraction, whatever is left (the decimal part) is the length in cm when multiplied by 100.
Remaining rope = starting length - what was used.
Remaining rope = 6.15 - 1.2
Remaining rope = 4.95 meters
Hence, The remaining rope he left = 4.95 × 100 = 495 cm
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what is the axis of symmetry of this graph?
Answer:
The axis of symmetry is x = -3.
If you draw a line at x = -3, the graph is reflected over it.
What are the domain and range of f (x) = -5/6 (x + 2)^2 - 8?
Answer:
Option B
Domain: all real numbers
Range [tex]f(x) \le -8[/tex]
Step-by-step explanation:
Given function is:
[tex]f\left(x\right)=-\dfrac{5}{6}\:\left(x\:+\:2\right)^2\:-\:8[/tex]
The domain is the set of all x values that result in a real and defined value for f(x).
The function has no undefined points and x is free to range from -∞ to +∞
So the domain is -∞ < x <∞ which is
All real numbers
The range is the set of all possible values for f(x) given a specific domain. In order to determine the range without too much hard work, let's first examine the function f(x)
The above function is the equation for a parabola.
Some things to note about a parabola equation:
The vertex form equation of a parabola is:Let us compare the general vertex form equation of the parabola with the specific f(x) equation given
General Equation: [tex]a (x - h)^2 + k[/tex]
This example: [tex]-\dfrac{5}{6}\:\left(x\:+\:2\right)^2\:-\:8[/tex]
Comparing the similarity between the two equations we easily see that
[tex]\boxed{a = -\dfrac{5}{6}}[/tex]
This means the parabola opens downward and (h, k) represents a max point in the parabola
[tex]x - h = x + 2\\\\-h = 2\\\\h = -2\\[/tex]
[tex]k = -8[/tex]
So the vertex is at (-2, -8)
Since -8 is the maximum value for f(x), and the parabola extends to infinity on both sides, the range is :
[tex]\boxed{f(x) \le -8}[/tex]
The attached graph may help you understand better
Deepak is a landscaper who charges $30 for each job he does plus an additional $15 for each hour he works. He only accepts jobs if he will earn at least $90 per job. He writes this inequality to determine x, the number of hours he must work during each job in order to accomplish this.
30 + 15 x greater-than-or-equal-to 90
Which best describes the restrictions on the jobs Deepak will accept?
Answer:
He only accepts jobs that last 4 or more hours.
Step-by-step explanation:
He only accepts jobs that last 4 or more hours.
He only accepts jobs that last 5 or more hours.
He only accepts jobs that last 8 or more hours.
He only accepts jobs that last 9 or more hours.
30 + 15x ≥ 90
15x ≥ 60
x ≥ 4
Answer: He only accepts jobs that last 4 or more hours.
can someone help me out
answers
2 units
3 units
5 units
7 units
The length of PT is 3 units. The solution has been obtained using the concept of transformation.
What is transformation?
A transformation is an operation that moves a polygon or other two-dimensional object on a plane or coordinate system.
The term "pre-image" or "inverse image" refers to the shape in two dimensions prior to any modification. The image is the shape after transformation.
Transformation can be done by translation, rotation, reflection and dilation.
We are given two rectangles ABCD and PRQT
AB = DC = 3 units
AD = BC = 10 units
It can be observed that the rectangles PRQT and ABCD are same but PRQT is rotated.
Since, they are same so,
AB = PT = 3 units
Hence, the length of PT is 3 units.
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Which of the following graphs represents the function g(x) = 3∛x – 1?
A graph which represent the function g(x) = 3∛x – 1 is: graph A.
How to graph the given function?In Mathematics, a graph simply refers to a type of chart that is typically used for the graphical representation of ordered pairs on both the horizontal and vertical lines of a cartesian coordinate, which indicates the x-axis and y-axis respectively.
Based on the information about this graph, it represents the following function:
Function, g(x) = 3∛x – 1
By rewriting the cube root in the above function, we have the following:
Function, g(x) = 3∛x – 1
Function, g(x) = 3(x^{1/3}) – 1.
Next, we would use an online graphing calculator to plot the given function as shown in the graph attached below.
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What is the solution to StartFraction 5 over 6 EndFraction x minus one-third greater-than 1 and one-third?
x > StartFraction 25 over 18 EndFraction
x < StartFraction 25 over 18 EndFraction
x > 2
x < 2
The value of x is x > 2.
What are Fractions?Fractions are numbers which are of the form a/b where a and b are real numbers. This implies that a parts of a number b.
Here, a is called the numerator and b is called the denominator.
Any number can be expressed as fractions.
The given expression is [tex]\frac{5}{6}[/tex]x - [tex]\frac{1}{3}[/tex] > 1 [tex]\frac{1}{3}[/tex]
We have to rewrite the expression with x on one side.
[tex]\frac{5}{6}[/tex]x - [tex]\frac{1}{3}[/tex] > 1 [tex]\frac{1}{3}[/tex]
[tex]\frac{5}{6}[/tex]x > 1 [tex]\frac{1}{3}[/tex] + [tex]\frac{1}{3}[/tex]
[tex]\frac{5}{6}[/tex]x > [tex]\frac{4}{3}[/tex] + [tex]\frac{1}{3}[/tex]
[tex]\frac{5}{6}[/tex]x > [tex]\frac{5}{3}[/tex]
x > [tex]\frac{5}{3}[/tex] × [tex]\frac{6}{5}[/tex]
x > 2
So the value of x is greater than 2.
Hence the correct option is x > 2.
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help me out pleaseeeeeeeeeeeeeeeeeee
Answer:
3 and 5
Step-by-step explanation:
In the first week of July, a record 1,120 people went to the local swimming pool. In the second week, 110 fewer people went to the pool than in the first week. In the third week, 135 more people went to the pool than in the second week. In the fourth week, 137 fewer people went to the pool than in the third week. What is the percent decrease in the number of people who went to the pool over these four weeks?
If in the first week of July, a record 1,120 people went to the local swimming pool. the percent decrease in the number of people who went to the pool over these four weeks is 10%.
How to find the percentage decrease?First week:
Number of people went to the local swimming pool =1120
Second week:
Number of people went to the local swimming pool =1120-110
Number of people went to the local swimming pool =1010
Third week:
Number of people went to the local swimming pool =1010+135
Number of people went to the local swimming pool =1145
Fourth week:
Number of people went to the local swimming pool =1145-137
Number of people went to the local swimming pool =1008
Decrease in number of people over four week=1120 -1008
Decrease in number of people over four week = 112
Percentage decrease = 112 /1120 × 100
Percentage decrease = 10%
Therefore the percentage decrease is 10%.
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