Solve x^2-8x-9=0 algebrically

Ron finds 9 books at a bookstore that he would like to buy, but he can afford only 5 of them. In how many ways can he make his selection? How many ways can he make his selection if he decides that one of the books is a must? a. 3024; 1680 b.

Which definitions or properties would you use to simplify the expression explain

The ratio 18 30 in simplest form

1. sqrt (6-3x) - 2=0 A. 2/3 B. 2 C. 10/3 D. 4

What is a maximum number of x intercepts that a polynomial of degree 12 can have?

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.