Answer:
6,561
Step-by-step explanation:
(-9)^4 = -9*-9*-9*-9= 6,561
Answer:
1. 615.75
2. 9
Step-by-step explanation:
Answer:
this is unsolvable i think
Step-by-step explanation:
Answer:

Step-by-step explanation:
Eliminate the equal sides of each equation and combine.

Solve
for
.

Evaluate
when
.

Answer: 72.4 ft
Step-by-step explanation: A2+B2=C2 20squared plus Bsquared=30 22.4 squared plus 20squared equals 30squared and when you add all that together you get 72.4 ft