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:

i hoped this helped!

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.