If seven integers are selected from the first 12 negative integers, how many pairs of these integers will have a sum of - 13?

Two triangles have side lengths 3, 4, 5 and 6, 8, 10, respectively. the triangles are similar to each other. a. True b. False

Heather drove 405 miles using 20 gallons of gas. At this rate, how many gallons of gas would she need to drive 243 miles?

A store is having a sale on DVDs and CDs. DVDs cost $4 and CDs cost $7. On one day, the store made $204 from DVD and CD sales, and sold a total of 39 items. Write a system of equations, then solve to find how many DVDs and CDs were sold.

How to find the max area that a 880 foot fence can enclose?

Given a geometric series, multiply every term by the same nonzero constant c. The resulting series must also be geometric. True False b) A new series is obtained from a geometric series by taking the reciprocal of each term.

The standard deviation for a set of data is 5.5. The mean is 265. What is the margin of error?

Is negative 13/3 rational or irrational

Nathan bought 12 pairs of bookends. If he paid a total of $204 for all the bookends, how much was the cost of pair of bookends?

An organic farm uses 3/7 of the land to grow potatoes and 2/5 of the land to grow spinach. The remaining land is used to grow tomato plants. What fraction of the land is used to grow tomato plants?

The graph shows the prices, in dollars, of different numbers of sandwiches at Juan's store. The table shows the prices, in dollars, of different numbers of scones at the same store.