There are 4 boys in a class of 13 students.
(a) What is the ratio of girls to boys?
(b) What is the ratio of girls to all students in the class?
8
X
5
?

A- 9:4

B- 9:13

8*5=40

To find girls, you need to subtract boys (4) from total (13).

You get 9, so that is girls. 9 girls to 4 boys. Total is 13 so 9 girls to 13 people total. For the last one, if you are asking 8*5, that is 40.

(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

16 is the absolute value

step-by-step explanation: