In a plan for area codes, the first digit could be any number from 3 through 8, the second digit was either 0 or 4, and the third digit can be any number but 0. With this plan, how many different area codes are possible?

The measure of angle X is 18 more than three times the measure of its complement. Find the measure of angle X.

One landscaper works 1.5 times as fast as another landscaper. Find their individual times if it takes 9 hours working together to complete a certain job.

Is 10/40 7/21 13/26 or 3/18 equivalent to 5/15

Why is 4:6 equivalent to 2:3

What multiplies to be - 63 and adds up to be - 2

Henry mixes 1 cup grape concentrate with 4 cups water to make his favorite drink. How much water will he need to mix if he uses 5 cups grape concentrate

A hot air balloon rises at a rate of 38 km/h and starts at the height of 60 km. Another balloon started from the ground and is rising at the rate of 50 km/h. At this rate what height will they be at when they are at the same height?

Factor sec^2x-secx+tan^2x

john is packing a box that is shaped like a cube and has an edge that is 25 centimeters long how much space is available in the box

A student has a container with a volume of 1.5 liters. She estimates the volume to be 2.1 liters. By what percent is the student's estimate off? (Round to the nearest percent as needed.)