Question

HELP ASAP PLEASE!!!! 30 POINTS

VERIFY THAT z= -3 is a solution to the equation -3z - 1 = 8
a. FALSE
b. NOT ENOUGH INFORMATION TO VERIFY
c. TRUE

Answer 1

True

Explanation:

This is substitution!

-3(z) - 1 = 8

-3(-3) - 1 = 8

9 - 1 = 8

8 = 8

Answer 2

⇝ True

In-depth explanation:

Hi there, to verify if z = -3 is a solution of -3z - 1 = 8, just plug it in:

`\mathsf{-3(-3)-1=8}`

Then simplify. The secret to this is, if we get a true statement, where the left hand side equals the right hand side, then we know that z = -3 is a solution. If we don't, then we conclude that z = -3 is not a solution.

Simplify:

`\mathsf{9-1=8}`

`\sf{8=8}`

`\bigstar\quad\textsf{Therefore, the answer is true.}`