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
timama [110]
2 years ago
14

What does a proportion look like?

Mathematics
1 answer:
AURORKA [14]2 years ago
6 0

A proportion looks like this:

a\div b = c\div d

It means that the quantity a,b,c and d are in the same proportion: the ratio between a and b is the same ratio between c and d.

They are particularly useful in situation when you have an example given, and you want to extrapolate the relationship for another couple.

For example, you can think of the following problem: "Five apples cost 2 dollars. How much will 8 apples cost?"

You can build the proportion

5\div 2 = 8\div x

And then solve it for x:

\dfrac{5}{2}=\dfrac{8}{x} \iff 5x=16 \iff x = \dfrac{16}{5} = 3.2

You might be interested in
A teacher had 21 red pens. If the ratio of red pens to blue pens she owned 3:1, how many pens did she have total?
olga_2 [115]
She owned 7 blue pens
21:7
She has 28 pens
8 0
3 years ago
Helpppppp!!!!!!!!!!!!!
kiruha [24]
<h3>Answer:  Choice B)  468 cm^2</h3>

============================================================

Explanation:

As the diagram shows, we have a triangular face with a base of b = 18 and height of h = 13. The area of this triangular face is:

A = 0.5*b*h

A = 0.5*18*13

A = 117 square cm or cm^2

This represents the area of one face, but there are 4 identical copies of this triangular face assuming this tetrahedron is a regular polyhedron. So we have a total surface area of 4*117 = 468 cm^2 which points us to choice B

This is the amount of paint you'll need to cover the outer surface of the pyramid, or you can think of it as the amount of wrapping paper needed. This assumes there are no gaps or overlaps.

5 0
2 years ago
Seven yachts enter a race. First, second and third places will be given to the three fastest yachts. How
joja [24]

Answer: this my pp: 8===========================>

Step-by-step explanation:

8 0
3 years ago
Explain how to rewrite the equation -2x - 6y = 18 in slope-intercept form.
MrMuchimi

Answer:

y = -1/3x -3

Step-by-step explanation:

-2x - 6y = 18

We want to solve for y since the slope intercept form is y =mx+b where m is the slope and b is the y intercept

Add 2x to each side

-2x-6y +2x = 2x+18

-6y = 2x+18

Divide each side by -6

-6y/-6 = 2x/-6 + 18/-6

y = -1/3x -3

This is in slope intercept form with the slope -1/3 and the y intercept -3

4 0
3 years ago
Read 2 more answers
The single 42 year old woman with a monthly salary $3700 spends $1200 on rent
MissTica

Answer:

3700-1200=2500

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Reciprocal of 1/10 = ?<br><br> Reciprocal of 16 = ?
    5·2 answers
  • Which of the following represents 1 a. [1, 6]<br> b. (1,6]<br> C. (1,6)<br> d. (1,6)
    7·1 answer
  • What is the answer to to the question -3 &gt; X/-7
    10·1 answer
  • -4+(-10t)/0.5+15
    13·1 answer
  • Help needed ASAP will give you BRAINLIEST
    7·2 answers
  • find the slope of the line between each pair of points (5,11) (-3,-6) explain how you got the answer so I can see.
    15·1 answer
  • What is the solution of the system? Use substitution. x - y = -6 6x - 3y = -9
    12·1 answer
  • HELP ME!!!!!!
    9·1 answer
  • Determine the range of the following graph:
    11·1 answer
  • Which expression represents "9 less than the product of 6 and a number, n"? *
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!