Test 1 Sec 3 14 please

There are two ways to go here. First, exponent rules.

Recognize that , so you can rewrite as . Of course, that simplifies:

Because you know that , you know you’ve got .

The other way to go is to plug in: pick values for *x* and *y* such that 3*x* – *y* = 12. For example, you may pick *x* = 5 and *y* = 3, because 3(5) – 3 = 12. Then you can evaluate and match it with an answer. However, since this is the no calculator section, you may decide that this is a suboptimal way to go because the numbers are a little too big to deal with easily unless you know your exponent rules (in which case you didn’t need to plug in in the first place).