Find the sum of the arithmetic sequence: -94, -112, -130,...; S10 A) 1280
B)-1280
C)-130
D) -1750

D) -1750

Step-by-step explanation:

n is number of terms, n=10.

a is first term, a=-94

d is common diffrerence, d = -112-(-94) = -18

okay wait before i answer, is this for your points on a graph?

(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