Yuan reads 10 books from the library each month for x months in a row. Write an expression to show how many books Yuan read in all. Then, find the number of books Yuan read if he read for 2 months.

10x

20

Step-by-step explanation:

expression

10x

for x = 2

10 (2)

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