Answer:
60 units
Step-by-step explanation:
use the distance formula

AB= 20
BC = 15
AC = 25
perimeter = 60
Answer: x=3
Explanation:
Step 1: Combine like terms 7x-2=9x-8
Step 2: Put all variables on one side and all numbers on the other 2x=6
Step 3: Divide x=3
Answer:
15
Step-by-step explanation:
a²+20²=25²
a²=625-400
a²=225
a=15
Answer:
t = 4
Step-by-step explanation:
Given that:

When h(t) = 80, we have that:

t = 0 represents when the ball has not been thrown at all, in its initial position.
t = 4 represents the time taken for the ball to hit the roof of the building on its way down.
Hence, our answer is t = 4. (t is in secs)