Roberta makes 9$ an hour plus a 12.5% commission selling jewelery. how much dows she eadn on an 8 hour shift in which she sells 380$ worth of jewelery

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

If johnny ate 5 cans of sugar, but in the kitchen they only had 3. what did johnny eat? (he found a secret stash btw.)

For the right triangle shown, the lengths of two sides are given. find the third side. leave your answer in simplified, radical form.