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goldfiish [28.3K]

3 years ago

12

Please please please help fast

1 answer:

muminat3 years ago

8 0

Answer:

A

Step-by-step explanation:

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Solve the system by substitution<br> -x - y - z= -8<br> -4x + 4y + 5z = 7<br> 2x + 2z = 4

Stella [2.4K]

First:

2x + 2z = 4

2(x+z)=4

x+z=4/2

x=2-z

-x - y - z= -8

-(2-z)-y-z= -8 replace x

-2+z-y-z= -8 (cancel z)

-2-y= -8

6 = y

Then:

-4x + 4y + 5z = 7 replace x and y

-4(2-z)+4*6 + 5z = 7

-8 + 4z + 24 + 5z = 7

16 + 9z = 7

9z = 7 - 16

9z = -9

z = -9/9

z= -1

Finally

x= 2-z replace z

x = 2- (-1)

x = 3

5 0

3 years ago

I just need help with 14,15,and the bonus

ira [324]

Answer:

9: a^8/c^2

Step-by-step explanation:

(a^4/c)^2

(a^8/c^2)

3 0

3 years ago

What is the shape name<br>please do fast.

vivado [14]

Answer:

$\boxed{\sf Parallelogram}$

Step-by-step explanation:

A parallelogram has opposite parallel sides and it is a quadrilateral.

7 0

4 years ago

Read 2 more answers

WILL GIVE BRAINLIEST! help please, if you don’t know all the answers just answer the ones you do know.

Mazyrski [523]

Answer:

a b b

is the answer

Step-by-step explanation:

mark brainliest

4 0

3 years ago

What is the slope of the line that passes through the points E(5, 1) and F (2, -7)?

never [62]

The slope between (5,1) and (2,-7) is 8 over 3

3 0

3 years ago