Casey has a total of 18 pens. Twelve of these pens are blue, and the rest are red.

What is the ratio of blue pens to red pens?

You're piloting an airplane to prepare for landing you change the planes altitude from a meters to c meters. Which expression represents the distance between two altitudes |a+c| |a-c| Both

What is the length y of the remaining, vertical side of the 30-60 right triangle?

You know 1mi = 1,760 yd. How many yd is 10 mi?

A={2,4,6,8,10} and B={1,2,3,4,5} Which solution set is the union A U B? A. {2,4} B.{1,2,3,4,5,6,8,10} C.{1,3,5} D.{7,9}

What times 12 equals 36

Lita estimates she will read 24 books during the summer. She actually reads 9 books. what is the percent error of her estimate?

We mathematical induction to prove the statement is true for all positive integers n. 8+16+24 + ... + 8n=4n (n+1)

How do we know that it's a parallel line

The Rivera family drove 267.9 miles from their home to Cape Cod, Massachusetts. They used 9.5 gallons of gas. How many miles per gallon of gas did they get on the trip?

What is the product? - 3 4 2 - 5 3 - 2 1 0