Find the first term and the common difference for the arithmetic sequence. Round approximations to the nearest
hundredth.
-$$\mathrm { S } _ { 30 } = - 1575 , \text { a } _ { 30 } = - 96$$
A) $\mathrm { a } _ { 1 } = 2775 , \mathrm {~d} = - 3$
B) $\mathrm { a } _ { 1 } = - 9 , \mathrm {~d} = - 6.4$
C) $a _ { 1 } = - 9 , d = - 3$
D) $\mathrm { a } _ { 1 } = 2775 , \mathrm {~d} = - 6.4$

Question

Quizplus · Accepted Answer

The sum of the first 30 terms and the 30th term are given. Using the formula for the sum of an arithmetic sequence and the formula for the nth term, we can solve for the first term and common difference.

Find the First Term and the Common Difference for the Arithmetic