7. If the length of one leg of a right triangle is three times the length of the other and the hypotenuse is 20, find the length
of the shorter leg (round your answer to the nearest tenth).

6.3 units

Step-by-step explanation:

We let x be the length of the shorter leg.

This implies that the length of other leg in terms of x is 3x , as shown in the image.

Using Pythagorean Theorem, we can find the value of x.

This implies that,

We divide through by 10

Taking positive square root of both sides,we obtain;

2/3

step-by-step explanation:

x-3y=4

step-by-step e