1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nadezda [96]
3 years ago
12

GIVING BRAINLIEST Write a proportion that could be used to solve for each variable. Then solve. 7 pencils for $1.68 p pencils fo

r $2.88 a. 7.1.68 = p/2.88; p = 10 c. 1.68/7 = p/2.88; p = 0.7 b. 7/1.68 = p/2.88; p = 12 d. 7/2.88 = p/1.68; p = 4
Mathematics
1 answer:
Evgesh-ka [11]3 years ago
8 0

The proportion that could be used to solve for the variable is:

\frac{7}{1.68}=\frac{p}{2.88} ; p = 12 ⇒ b

Step-by-step explanation:

Direct proportion means that two (or more) quantities increase or decrease in the same ratio

  • y = k x is the equation of direct proportion, where k is the constant of proportionality
  • \frac{y_{1}}{x_{1}}=\frac{y_{2}}{x_{2}}=k is the another way to write a proportion

The number of pencils and the cost of them is increased together or decreased together

∴ The number of the pencils and their costs are in direct proportion

- By using the 2nd rule above

∵ The cost of the 7 pencils is $1.68

∵ The cost of p pencils is $2.88

∴ \frac{7}{1.68}=\frac{p}{2.88}

The proportion that could be used to solve for the variable is: \frac{7}{1.68}=\frac{p}{2.88}

∵ \frac{7}{1.68}=\frac{p}{2.88}

- By using cross multiplication

∴ p × 1.68 = 7 × 2.88

∴ 1.68 p = 20.16

- Divide both sides by 1.68

∴ p = 12

The value of variable p is 12

Learn more:

You can learn more about the proportion in brainly.com/question/10708697

#LearnwithBrainly

You might be interested in
What is the means-to-MAD ratio of the two data sets, expressed as a decimal to the nearest tenth? Data Set 1: {85, 83, 90, 70, 8
RoseWind [281]
Here is what I got for the first one. MAD= 1/(N)*(|x1-xm|+|x2-xm|+..+|xN-xm|) =1/5(|85-83|+|83-83|+|87-83|+|90-83|+|70-83|) =1/5(2+0+4+7+13)) =5.2 And for the second one I got, MAD= 1/(N)*(|x1-xm|+|x2-xm|+..+|xN-xm|) =1/5(|75-76|+|74-76|+|68-76|+|83-76|+|80-76|) =1/5(1+2+8+7+4)) =4.4
6 0
3 years ago
Please help with Algebra!!! 10 points!
Tju [1.3M]
4. D
5. A
6. C
7. D
8. D
9. B
10. B
5 0
3 years ago
Assume f(x) = g(x). Which of the following two functions may be used to represent the function 3x = x – 4? *
nirvana33 [79]

Since we know that the two functions are equal, f (x) = g (x), therefore when we equate the two equations the result should be similar to 3x = x – 4:

 

A. f(x) = 3x, g(x) = x – 4

Equating the two functions:

3x = x – 4             (correct)

 

So we now got our answer (A)

8 0
3 years ago
HELP!!!!!!!!!!!!!
irinina [24]
You would need to use the pythagorean theorum which is would be 8 squared +x squared = 15 squared
8 0
3 years ago
Read 2 more answers
Find an equation of the plane that is parallel to the xz-plane and is located 11 units to the right of the xz-plane in standard
mina [271]

Answer:

y = 11

Step-by-step explanation:

Since our plane is parallel to the xz plane, the x and z are independent of each other, i.e. they could be anything. So xz plane has an equation of y = 0. So if this plane is located 11 units to the right of the xz plane then its equation must be y = 11.

8 0
3 years ago
Other questions:
  • Nola’s car gets approximately 42 miles per gallon. She is planning to drive x miles with her friends
    15·2 answers
  • Please help me!!! I need help on the bottom part of number 11. Please help me
    14·1 answer
  • What expression is equivalent to 2(a+2b)-a-2b
    7·1 answer
  • Right triangle ACB has side lengths c = 17 inches and a = 8 inches
    9·1 answer
  • If the slope of F(x) was multiplied by -2/7 and the y-intercept was decreased by 7 to create a new fuction G (x) describe the tr
    10·2 answers
  • Write the equation y - 5 = -5(x + 2) in general form.<br><br> Plz Help
    7·1 answer
  • Find the slope of the line going through the points (6, 3) and (1, -22)
    5·1 answer
  • What expression is equivalent to -3(6x+7)+4(7x+2)
    9·1 answer
  • 3 x 10 + 2 x 1 + 6 x 1|100 + 4 x 1|1,000 is the expanded form of which decimal?​
    10·1 answer
  • What is the area, in square units, of a trapezoid bounded by the lines $y = x$, $y = 10$, $y = 5$ and the $y$-axis? express your
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!