Your family went out to eat and left the waiter a 18%tip. the total before the tip was $47.98 what should be paid to the waitress for her tip

For what is the measure of the angle at the top of the shed? a. multiplication of areas b. squaring of areas c. addition of areas d. division of areas

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Asap! i'm not good math and i'm lost.