The bottom of a ladder is resting 5 feet from the wall. The wall and the ground form a right angle. If the ladder is 10 feet long, how far up the wall does it reach

Step-by-step explanation:

The ladder forms a right angled triangle with the rock so we can make use of the pythagoras theorem.

Where;

Hypotenuse = length of the ladder = 10ft

Adjacent= horizontal distance on the ground= 5ft

Hence;

H^2 = O^2 + A^2

10^2= O^2 + 5^2

100= O^2 + 25

O^2 = 100 - 25

O = _/75 = 8.660

439400

step-by-step explanation:

130^2 = 16900

16900*26 = 439400

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.