20 • 3=60, 25 • 4=100. 60+100=160. 160-10=150. Josie makes $150.
        
                    
             
        
        
        
Because 3/8 as a percentage would be 0.375%
        
             
        
        
        
Answer:
x = 5√3; y = 5
Step-by-step explanation:
Finding y:  The sine function links the 30° angle, the 10 unit hypotenuse and the side opposite the angle, y:
sin 30° = 1/2 = y/10
                                   
Solve the equation of ratios
1        y
-- = -----  using cross-multiplication first:  2y = 10 → y = 5
2     10
We can now find x either by using a similar approach and the cosine function or by using the Pythagorean Theorem:
x² + y² = 10² = 100  →  x² = 100 - y²  =  100 - 5²  = 75
If x² = 75, then x = ±√75 = ± (√25)·(√3)   →  ±5√3
Since lengths are always positive,   take x = 5√3 as the answer.