If 100 enevelopes cost 70 cents how much would 250 cost

Jin and Rhonda together spent $97 on sports equipment. If Rhonda spent $7 more than Jin, how much did Jin spend?

Assuming that you attend school 180 days a year for 8 hours a day from first through twelfth grade, you'd be in class for a total of 2160 school days.

The area of the shaded region of circle O is 9π m2 , and the measure of angle AOB is 22.5 degrees. What is the length of the radius of circle O?

Barry has $21.50 left from his allowance. He wants to buy a book for $5.85 and a CD for $14.99. Assuming these prices include tax does Barry have enough money left to buy the book in the CD?

4 (x+2) = 20 what's the answer

Given the cost function Upper C (x) and the revenue function Upper R (x) , find the number of units x that must be sold to break even. Upper C (x) equals15xplus24 comma 000 and Upper R (x) equals17x.

Find an equation of the circle with center at (-2,3) that is tangent to the y-axis in the form of (x-a) ^2 + (y-b) ^2=c where a, b, c are constants.

What is the product? 3 1/2 * 2 2/3

The gravitational attraction between two masses varies inversely as the square of the distance between them. If the attraction force between them is 75 lbs.

The smallest hummingbird is the Bee hummingbird. It has a mass of about 1 1 4 grams. The mass of a larger type of hummingbird is about 5 times the mass of the Bee hummingbird. What is the mass of the larger hummingbird?