How to multiply a positive rational number and a negative rational number

Ling drove at an average speed 78 kilometers per hour for 45 minutes she then increased her average speed by 6 kilometers per hour and drove for 20 more minutes before reaching home find the total distance ling traveled

Chelsea has four hours of free time on saturday. she would like to spend no more than 2/3 of an hour on each activity. how many activities can she do during that time? justify your procedure.

An (independent or dependent) variable can be assigned any value. The variable that changes depending on the (independent or dependent) variable is called the (independent or dependent) variable.

a plane flew 2,100 km with the jet stream in 2.5 hours. the return flight against the jet stream took 3.75 hours. find the speed of the jet stream and the airspeed of the plane.

If a plane is traveling 300 miles per hour how long will it take to travel 1800 miles?

Jojo, my cat, had eight kittens. Three were black with white spots. Four were all black. The last one was gray. What is the ratio of all black cats to the entire litter of kittens?

The sequence {} is defined by = 5 and what is the value of

A plumber has a 40-foot piece of PVC pipe. How many 11/5 foot pieces can be cut from the 40 foot piece?

Ben is planning to fence his rectangular garden the area of the garden is 50 square feet and the length of the garden is twice the width how many feet of fencing will he need

The water level in a lake was 12 inches below normal at the beginning of March. The water level decreased by 2 inches in March and increased by 1 inches in April.