Asked by Wendy

The 10th term of an a.p is -27 and the 5th term is -12 what is the 18th term? Find also the sum of its 25 term
Answered by Reiny
"10th term of an a.p is -27---> a + 9d = -27
" 5th term is -12" ----> a + 4d = -12

subtract them , the a's drop out and you can find d
then find a

then use your formulas for term(18) and sum(25)
Answered by Ruth
pls I need the answer complete
Answered by Ruth
Good
Answered by Oreoluwa
Pls I need the answer complete