A box contains 10 book covers: 5 red, 2 blue, and 3 yellow. If a student randomly selects one book cover, what is the probability that the book cover he chooses will be red or blue?

Where would 4,500 go in integers, whole, and rational numbers

The quotient of a number and 6decreased by 10 is equal to 2?

Suppose an investment of $1,800 doubles in value every 7 years. How much is the investment worth after 42 years?

The United States uses 4 * 109 megawatt hours of electricity in a year. Mexico uses 2 * 108 megawatt hours in a year. How many times more megawatt hours does the United States use than Mexico in a year?

if person earned a score higher than 35 persons in his class of 50 students, what is the percentile score?

Each of the p children at a park receive 3 balloons. If the children receive at least 150 balloons in all, find the minimum number of children at the park.

1. z^2 = 1 √{ } = √{ } z = ± { } The solutions are { } and { }

What is the rate for 171 And 3

At the start of the summer, you have $603.15 in the bank. You make deposits of $90.89 in June, $106.03 in July, and $70.04 in August. At the end of the summer, how much money do you have in the bank?

A plane traveling from phoenix to san Francisco with a tailwind of 35 miles per hour takes 2.5 hours. returning with the headwind it takes the same plane 2 hours and 45 minutes. what is the average speed of the plane in calm conditions?