SOLUTION: Insert 3 arithmetic means between -19 and 79. (common difference) Use a formula and show your work. Hint: This is an arithmetic progression with 5 terms, so n=5, hint: find d th

Algebra ->  Sequences-and-series -> SOLUTION: Insert 3 arithmetic means between -19 and 79. (common difference) Use a formula and show your work. Hint: This is an arithmetic progression with 5 terms, so n=5, hint: find d th      Log On


   

Question 739565: Insert 3 arithmetic means between -19 and 79. (common difference)
Use a formula and show your work. Hint: This is an arithmetic progression with 5 terms, so n=5, hint: find d then add etc.
-19, _____, _____, _____, 79
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
(-19)+(5-1)*d=79, because the first term is (-19)+(1-1)*d=-19.
Solve for d.

-19, -19+(2-1)d, -19+(3-1)d, -19+(4-1)d, 79