What is the answer to all these questions my daughter needs i don’t understand the stuff

7. Divide the amount of money made by the number of items sold.

Round 14.5 to the nearest integer.

B.     15

8. Since 397.3 is being divided by 10^3 you must move the decimal to the left by 3 spaces.

B.   .3973

9. You can figure this out mentally by if the second number is approximately half of the first number.  I chose 15/16 - 3/8 because 15/16 is almost 1 and 3/8 is almost a half.  one minus a half is a half.

C.   15/16 - 3/8

10. For something to be a common denominator between two numbers, it must be divisible by both numbers.  3 is the only number that is not divisible by two

D.   3

11. Since he is making 12 dozen, and he needs 3/4 tea spoons per dozen, he should need 12*(3/4) tea spoons in total.

A.  

12. If each necklace is 2/3ft, then you can multiply the amount of necklace by 2/3 to see if it is equal to 6.  The answer is 9 because 9 * (2/3) = 6

A. 9

the correct answer is the second option

(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