some friends are playing a card game. Heather has 8 times as many cards as Alejandro. Heather has a total of 24 cards. write a number sentence to show how to find the number of cards that Alejandro has.

Identify the amplitude and the period of the function c (x) = 3cos (x + π).

A group of friends is comparing how far they can each throw the same ball. Charlie threw the ball 78 feet. Martin threw the ball 16 yards. Reisha threw the ball 720 inches. Choose the true statement (s).

Mr. James wants to build a walkway around his school garden. The width of his garden is one-third the length. The perimeter of the school garden is 32 feet. What is the length and width of his garden?

Alex bought 1029 stickers for the kids at PS105. Doris bought 234 more stickers than Alex but 193 fewer stickers than Mamie. How many stickers did Doris buy? How many stickers did Mamie buy?

For an arithmetic sequence where a1 = 13 and the common difference is 3, find s7 . A. 162 B. 154 C. 151

Solve 1/2+1/2x=x^2-7x+10/4x by re-writing the equation as a proportion. Which proportion is equivalent to the original equation?

What is the complement of 86.4 degrees?

Last year, my parents had a combined income of $50,000. They paid $13,000 in federal income taxes. What fraction shows how much my parents spent on their federal taxes?

Find the product of 2x^2 (x + 3)

The wingspan of a model airplane is 35 inches. The model has a scale factor of 1 inch = 3 feet. What is the wingspan of the actual airplane? Explain how you found your answer.