a 25 foot ladder is placed 7 feet away from wall

how high up the wall will the ladder reach

A 18

B 20

C 22

D 24

24 feet

Step-by-step explanation:

The ladder and the wall form a right triangle, so we can use Pythagorean Theorem

a^2+b^2=c^2

25 is c, or the hypotenuse, because it is opposite the right angle.

7 is a, and x is b.

7^2+x^2=25^2

Solve the exponents

49+x^2=625

Subtract 49 from both sides

x^2=576

Take the square root of both sides

x=24

The ladder reaches 24 feet up the wall

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1