Answer:
z=6 and z=-6
Step-by-step explanation:

Divide both sides by 7

Find the square root
z=±√36
z=±6
Therefore, z=6 and z=-6.
I hope this helps!
Answer:
multiply them all together to get 84 cubic meters.
Step-by-step explanation:
7 times 3 times 4 = 84
Answer: jdx(3x + 3)
Step-by-step explanation:
1. Simplify 3 x 3 to 9.
2. Simplify 5 x 2 to 10.
3. Simplify 9 - 10 + 3x + 4 to 3x + 3.
4. Regroup terms.