Answer: z = 7
Step-by-step explanation:
Step 1: Subtract 4 from both sides
z + 4 - 4 = 11 -4
z = 7
The answer is 255cm<span>²</span>
Answer: 36π
Step-by-step explanation:
A = πr²
A = π(6)²
A = 36π
Answer:
<h2>x = 9</h2>
Step-by-step explanation:

Answer:
12r^2 +r -7
Step-by-step explanation:
9r^2 +4r -7 +3r^2 -3r
Combine like terms
9r^2 +3r^2 +4r -3r -7
12r^2 +r -7