Mike is three times as old as his little sister, Mary. In 4 years, he will be twice as old as Mary. How old is Mary?

When a jug is 1/2 filled with marbles, it weighs 2.6 kg. The jug weighs 4 kg when it is full. Find the weight of the empty jug.

The probability of an event A occurring is 0.73. Determine. P (A) a) 0.73 b) 0.00 c) 0.27 d) 1.00

Determine whether the equation is an identity or not an identity.

One aluminum can weighs about 1/25 lb. if your school starts a recycling drive, how many cans will your school me to collect to recycle one ton?

What operation should be used to solve the equation 153=g+45

A plane left chicago at 8:00 A. M. At 1 PM the plane landed in Los Angles, which is 1500 miles away. What is the average speed of the plane for the trip?

The space shuttle can travel about 8*10 to the power of 5 centimeters per second. Is it more appropriate to report this rate as 8*10 to the power of 5 centimeters per second or 8 kilometers per second?

Which set of side lengths form a right triangle? A 14m, 20m, 25m B 10cm, 6cm, 8cm C 7cm, 8cm, 10cm D 3ft, 6ft, 5 ft

A car tire has a radius of 1.5 feet. If the tire is rotating at 800 rpm, what is the speed of the car in miles per hour (1 mile = 5,280 feet) ? Round the answer to the nearest tenth.

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. Mrs. Walters drove 160 miles on 5 gallons of gas. How many gallons of gas will she need to travel 256 miles?