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3 years ago

Sheila needs to hire a baby sitter for the evening.

Mathematics

1 answer:

marissa [1.9K]3 years ago

5 0

Answer: The answer is 21

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Find x! Please help!!

a_sh-v [17]

${(8 + x)}^{2} = {8}^{2} + {15}^{2} \\ {(8 + x)}^{2} = 64 + 225 \\ {(8 + x)}^{2} = 289 \\ {(8 + x)}^{2} = {17}^{2} \\ 8 + x = 17 \\ so \: x = 17 - 8 = 9$

5 0

3 years ago

Solve the system of equations. 2y+7x=−5 5y−7x=12

3241004551 [841]

We can solve this by substitution method.

Look at the second equation. If we rearrange to find 7x, we can substitute in the value into the first equation.

$5y-7x=12$

$5y-7x-12=0$

$5y-12=7x$

Therefore, $7x=5y-12$

Now replace the 7x in the first equation with 5y - 12:

$2y+7x=-5$ (substitute in 7x = 5y - 12)

$2y+(5y-12)=-5$

$7y-12=-5$

$7y=7$

$y=1$

Now that we know y, we can find x by substituting in y = 1 into any equation we want. I will use the equation: 7x = 5y - 12

$7x=5y-12$ (substitute in y = 1)

$7x=5(1) -12$

$5x=5-12$

$7x=-7$

$x=-1$

__________________________________________________________

Answer:

$y=1\\x=-1$

4 0

3 years ago

Help please?????? I neeeeedc helppp

Sav [38]

Area of rectange = 5 x 8 = 40
area of green triangle = 1/2(8)(1) = 4
area of yellow triangle = 1/2(4)(8) = 16
area of blue triangle = 40 - (4+16) = 40 - 20 = 20

answer
C. 20

7 0

3 years ago

Read 2 more answers

Factor completely 4x^2 − 8x − 60.

hram777 [196]

The answer is B, 4(x-5)(x+3)

7 0

3 years ago

Read 2 more answers

What pair of numbers is relatively prime

Leona [35]

Answer:

Step-by-step explanation:

Two integers are relatively prime (or coprime) if there is no integer greater than one that divides them both (that is, their greatest common divisor is one). For example, 12 and 13 are relatively prime, but 12 and 14 are not.

3 0

4 years ago