Aplumber charged $78 for 4 hours' work. what is his rate per hour?

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?