Francis heard that a car stereo system was on sale for 30% off. if the sale price was $57.75, what was the original price of the stereo?

$82.50

Step-by-step explanation:

Francis heard that a car stereo system was on sale for 30% off.

The sale price was $57.75.

Let the original price of the car stereo system be 'x'

sale price = x - (30% of x) = 57.75

x - 0.3x = 57.75

0.7x = 57.75

x =  

x = 82.5

The original price of the stereo system was $82.50.

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

i can't read the graph

step-by-step explanation: