Hans leaned a 17 ft ladder against his house. He placed the base of the ladder 8 ft from his house, and the top of the ladder reached the base of his window. How high is the base of his window from the ground?+=
A.25
B.15
C.23
D.17

b

Step-by-step explanation:

so 17 squared minus 8 squared is 225. the square root of 225 is 15

if you mean

then it's c. 8, -7/3

but if you mean

then it is

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!