Find the first five terms of the geometric sequence for which a1 = 10 and r = –1

A geometric sequence works like this: you have a starting point , and you generate the next term by multiplying the previous one by the common ratio

In your case, the common ratio is -1, which means that you get every other term by changing the sign of the previous one.

So, the sequence goes like this:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour