Greg’s mother fills the tank of her car with gas on Saturday morning. She uses 1/4 of the tank on Saturday and another 2/5 of the tank on Sunday. How much gas remains in the gas tank?

7/20

Step-by-step explanation:

You would do one whole tank minus how much she used on Saturday and minus how much of the tank she used on Sunday.

1-(1/4)-(2/5)=7/20

(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

you can't solve x because it is 2 linear equation and you only have one equation