Answer:
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
