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3 years ago

5

Question 5 of 10

1 answer:

nirvana33 [79]3 years ago

8 0

Answer:

6x +35 +9x = 15(x+4)

6x +35 +9x = 15x + 60

15x +35 =15x +60

0x= 25

0x= no solution

Step-by-step explanation:

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Solve the systems of equations using substitution. <br> -3x + 2y = 12<br> x = 2y - 8

ankoles [38]

-3(2y-8) + 2y = 12

-4y + 24 = 12

-4y = -12

y=3

x=2(3)-8

x=-2

4 0

3 years ago

A square has an area of 81x square cm. What is the perimeter of the square ?

Fudgin [204]

Answer:

The perimeter of the square is $36\sqrt{x}\ cm$

Step-by-step explanation:

step 1

Find the length side of the square

we know that

The area of a square is equal to

$A=b^{2}$

where

b is the length side of the square

we have

$A=81x\ cm^{2}$

substitute and solve for b

$81x=b^{2}$

square root both sides

$b=9\sqrt{x}\ cm$

step 2

Find the perimeter of the square

we know that

The perimeter of the square is equal to

$P=4b$

we have

$b=9\sqrt{x}\ cm$

substitute

$P=(4)9\sqrt{x}$

$P=36\sqrt{x}\ cm$

6 0

3 years ago

Masja [62]

I just realized I forgot a whole unit we did this year, but a(n)=5n-12
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7 0

3 years ago

Riley has r red peppers and 51 green peppers. Write an expression that shows how many peppers Riley has.

True [87]

Answer:

r+51 peppers

Step-by-step explanation:

8 0

3 years ago

If I get 100 dollars a week for four months how much will I have

Gre4nikov [31]

Answer:

1600 dollars

Step-by-step explanation:

Find out how much you earn a month

1 month = 4 weeks

1 month = 100 x 4 = 400 dollars

Now find out 4 months

4 months = 400 x 4 = 1600 dollars

4 0

3 years ago

Read 2 more answers