(56/7)*(42/7)= how do you solve this problem can someone explain it to me

To multiply fractions, multiply straight across. Multiply the numerators and the denominators. Multiply 56 times 42 and 7 times 7.

You can simplify 2352/49 even more by dividing 2352 by 49. 2352/49 = 48, so your answer is 48.

(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