Samuel used 1/5 of an ounce of butter to make 1/15 of a pound if jelly, how many ounces of butter are needed to make a pound of jelly?

3 ounces of nuts

(1/4) / (1/12) = x / 1 cross multiply

1/4 = 1/12 x                divide both sides by 1/12

x =1/4 / 1/12

x =1/4 x 12/1

x =12/4

x = 3 ounces of nuts.  

(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

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.