What is the value of x in the figure below?

Option D.

Step-by-step explanation:

we know that

In the right triangle ABC

The function cosine of angle C is equal to divide the adjacent side to the angle C (AC) by the hypotenuse (BC)

substitute the values

cos(C)=15/20 ----> equation A

In the right triangle CAD

The function cosine of angle C is equal to divide the adjacent side to the angle C (CD) by the hypotenuse (AC)

substitute the values

cos(C)=x/15 -----> equation B

equate equation A and equation B

Simplify

Divide by 5 both numerator and denominator

whatever you can spend with $11.53 or under.

step-by-step explanation:

20 - 8.47 = 11.53. take away the money he used for lunch from the starting amount of 20.

this doesn't make sense lol