Robert is 15 years older than his sister, Helen. The sum of their ages is 63. Find their ages.

6/x = 36/54 (what is x)

There are 8 students in a class: 4 boys and 4 girls. If the teacher picks a group of 3 at random, what is the probability that everyone in the group is a girl?

Which describes a uniform probability model? A) drawing a red or black card from a deck of cards B) selecting a ball from 2 red balls and 3 yellow balls C) selecting a sock from 5 black socks and 10 white socks D) equally divided five section

Which of the following scale factors will result in an enlargement?

Choose what the expressions below best represent within the context of the word problem. The sum of two consecutive odd integers equals 12. What are they?

What plot is used for data ordered smallest to the largest median

Solve the solution for y. Y-3x=13

The cost of paper varies directly with the number of reams bought. Suppose 2 reams cost $5.10. Write a linear equation that could be used to find the cost of x reams of paper. Find the cost of 15 reams of paper

What is 16231 divided by 23

A certain first covers an area of 4100 km^2. Each year this area decreases by 3.75 percent. What will the area be after 11 years?