3 * 2 = 6
The answer would be D
Ans : -28 & 59
So, first let one number =x and the other number = y
Equation : x+y = 31
x-y= 87 ( solve simultaneously)
The first term a = 1,
Common difference, d: 7 - 1 = 6.
a(n) = a + (n -1)d,
For 30th term. = 1 + (30 -1)*6
= 1 + 29*6 = 1 + 174 = 175
1 foot = 12 inches
1 foot x 8 = 12 inches x 8
8 feet = 96 inches
4 inches less than the amount of lumber needed
