The first square number is 1, and the sum of the first 20 square numbers is 2870. Work out the sum of the first 21 square numbers.

If you measure the width of a window in inches and then in feet, which measurement would have the greater number of units?

Solve for k |15-2k|=45

There are 20 20 coins in a jar. Each coin is either a nickel or a quarter. If one of the coins is selected at random, the probability of selecting a nickel is 0.6 0.6. How many quarters are in the jar?

For every five flowers, there are 10 yellow flowers. There are a total of 75 yellow and red flowers in her garden how many red flowers are in her garden

What is 6/10 as a decimal

What's the relationship between 0.04 and 0.004?

The length of a rectangular garden is 7 meters longer than its width. if its perimeter is (12 x + 14) meters, find its length in terms of x.

Job A pays $10.95 per hour, 40 hours per week. Job B pays $18,500 per y. Which job pays better? A) Job A B) They pay the same. C) Job B

4x-6+2y=10 Write the equation in slope intercept form.

Solve for y: 10y-50=-20