Which algebraic equation represents: “Three times the difference of x and 9 is 15”? A. 9x - 3 = 15 B. 3•9 - x = 15 C. 9 - 3x = 15 D. 3•(x - 9) = 15

D. 3•(x - 9) = 15

Step-by-step explanation:

Three times the difference of x and 9 is 15

        3                               (x - 9)            = 15

3(x - 9) = 15

(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

pi x^2

step-by-step explanation:

pi times x squared