Given an arithmetic sequence where a1=5 and a9=-19 find a42 Please help I’m so desperate I’ll give branliest

-76/8 = -19/2

In an arithmetic sequence, the nth term, an, is given by the formula:

an = a1 + (n - 1)d, where a1 is the first term and d is the common difference.  

So, a9 = a1 + 8d

Substituting in the given data, 12 = 88 + 8d

                                                    -76 = 8d

                                                      d = -76/8 = -19/2

Step-by-step explanation:

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15 units use socratic

step-by-step explanation: 15 units

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