The sum of the first 4 terms of an A. P is 4, the sum of the first 12 terms is 28. Find the A. P

Step-by-step explanation:

T4=a+(4-1)d

a+3d=4(1)

T12=a+(12-1)d

a+11d=28(2)

using elimination method

3d-11d=4-28

-8d=-24

d=3

substitute d=3 in equation (1)

a+3(3)=4

a=4-9=-5

so the A.P is -5,-2,1,4,7,10,13,16,19,22,25,28

location: point 0

step-by-step explanation:

well, -8 to 10 on a number line is 18 spaces.

1/9 of 18 is 2.

so, 4/9 of 18 must be 8.

8 spaces from -8 (a) is 0.

so, 4/9 of the way from -8 to 10 is 0!