Answer:

Step-by-step explanation:
AD = 4
AC = 11
DC = 11 - 4 = 7
First, find BD using the right triangle altitude theorem:

Plug in the values


Use pythagorean theorem to find x:
x² = AD² + BD²
Plug in the values





Take the square root of both sides




20 - (4xn) = 4 is the equation
Answer:

Step-by-step explanation:
We are given that

a=1

Substitute n=3 and a=1



Where 

Using the formula






By using the formula




Substitute the values

