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stellarik [79]
3 years ago
11

Rewrite the proportion 7:21 = 3:9 as a proportion using fractions.

Mathematics
2 answers:
Inessa [10]3 years ago
4 0

Answer:

1/3 ig

Step-by-step explanation:

VARVARA [1.3K]3 years ago
4 0

Answer: In this problem you want to rewrite the proportion 7:21 to 3:9.

First, a proportion is a relation between two quantities, this is if the proportion of A to B is 7:21, then you can represent it in a equation as:

7*A = 21*B

If you divide by the same number in both sides of the equation, you dont affect the equality, then if i divide both sides by 7, the equation turns into:

7*A/7 = 21*B/7

A = (21/7)*B = 3*B

Now if i multiply both sides by 3.

3*A = 3*(3*B) = 9*B

3A = 9*B

so now the proportion is 3:9.

Also, if you want to see if two proportions are equivalent, you need to see that quotients are the equal.

In this case 21/7 = 3, and 9/3 = 3.

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PLZ HELP I CANT GET MY PHONE UNTIL I PASS THIS TEST HELP!!!!!!!
sladkih [1.3K]

Answer:

49

Step-by-step explanation:

4 : 3

x : 21

ok so we can divide 21 by 3 and get 7.

7 × 4 = 28

4 : 3 = 28 : 21

now we just 28 + 21 = 49 :D

5 0
3 years ago
Can someone please explain how to solve this.<br><br> p^-4 x -5p
solong [7]
P^-4 x -5p

In properties of exponents, if the exponent is negative then you move the variable with the negative exponent to the denominators place and it changes to positive and the numerator becomes 1.

p^-4=1/(p^4)

Also, if no exponent is present it is understood to be 1.

Keeping this in mind,
p^-4 x -5p
1/(p^4) x -5p^1            substituted p^-4 by 1/p^4 and added ^1 to -5p
-5p^1/p^4                     multiplied-5p^1 to 1 
-5/p^3                          simplified 
6 0
3 years ago
You start at (4,3). You move left 3 units. Where do you end?
stepan [7]

Answer:

(1,3)

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Find the perimeter of shape #8
Wittaler [7]
The squiggly lines and the 2 straight lines through to sides of the pentagon mean that they are congruent (equal in length).

So, to find the perimeter of a regular polygon, you add all of its sides together.


So, the perimeter= 4x-2+x-2+x-2+x+2+x+2

To simplify it, add all of the x's together.

4x+x+x+x+x=8x

Perimeter=8x-2-2-2+2+2

-2-2=-4-2=-6+2=-4+2=-2

Perimeter=8x-2

Reach out to me if you have any questions. I'd be glad to help! :)
4 0
3 years ago
What do you get when you plug 4 in the following function?​
Leno4ka [110]

Answer:

567

Step-by-step explanation:

It will become:

y = 7(3)^4

y = 7 * 81

y = 576

4 0
2 years ago
Read 2 more answers
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