A boy is building a pyramid out of building blocks. He puts 20 blocks in the first row, then he puts 19 blocks in the row above, and so on. Find the total number of blocks he needs.

7/15+9/15+4/15 A. 7/9 B. 1 13/15 C. 2 2/9 D. 1 1/3

Add. 5/6 + 2 3/4 Enter the sum in the box has a mixed number in the simplest form

Vanessa buys a strip of 25 postage stamps. The strip of stamps is 21 7/8 inches long. How long is a strip after Vanessa uses 1 stamp

Find the LCM of 10 a^2 b and 15 ab^3

Jayne has 3 bags of candy. Each bag has 12 pieces of candy. If 3/4 of the candy is chocolate, how many pieces of candy is not chocolate?

jenny is purchasing art supplies she buys 3 jars of acrylic paint for 0.89 each set of paintbrushes for 11.99 and a blank canvas for 17.25 the sales tax is 6.25 what is the total cost of jenny purchase including tax

Are 60 meters equal to, greater than, or less than 6 km?

Factor completely x^2+4x-32 (x + 8) (x - 4) (x + 8) (x + 4) (x - 16) (x - 2) (x + 16) (x - 2)

a company gives raises once-a-year amir's present salary of $16,000 his manager would like to raise amir's salary to 35,000. What percent raise would Amir be receiving?

A garden is 5 yards 12 inches wide and 6 yards long. Write the ratio of the width to the length as a fraction in simplest form.