What's 7/9 times something equals 640

You are given a rectangular sheet of cardboard that measures 11 in. by 8.5 in. (see the diagram below). A small square of the same size is cut from each corner, and each side folded up along the cuts to from a box with no lid. 1.

Alex buys 7 dvds. each dvds costs $12. if alex receives a $4 discount on each dvd, what is the total amount of money alex spends? write an expression that matches the words.

8 foot piece of wood cut into how many 7/8 inches?

Rogue Industries reported the following items for the current year: Sales = $3,000,000; Cost of Goods Sold = $1,500,000; Depreciation Expense = $170,000; Administrative Expenses = $150,000; Interest Expense = $30,000; Marketing Expenses = $80,000;

In a group of 120 farmers, 65 grow maize and 75 grow cassava. Of these 35 grow both maize and cassava. a. Find the number of farmers who grow only maize.

A basket of beads contains eight red beads six yellow beads and six green beads. A bead will be drawn from the basket and replaced 150 times. What is a reasonable prediction for the number of times a green bead is drawn?

How many different 10-letter code words can be constructed from the English alphabet?

The circumference of a circle with a radius of 2 meters is approximate by the perimeter of an inscribed polygon with 10 sides. Which expression gives the described approximation of the circumference?

2x^2-16+22=0 (quadratics)

In ΔABC, AB = 20 cm, AC = 15 cm. The length of the altitude AN is 12 cm. Prove that ΔABC is a right triangle.