your friend runs for (x² – 225) seconds at a rate of

per second. how far does your friend run?

(x + 15) / 2

Step-by-step explanation:

Distance = rate × time

d = (x² – 225) / (2x − 30)

d = (x – 15) (x + 15) / (2 (x – 15))

d = (x + 15) / 2

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

10 b/c 5*2 =10

step-by-step explanation: