What is the perimeter of a semicircle with a diameter of 18?

Arie has $46 in his account and is saving $8.50 each week. Olga has $14 in her savings account and is saving $12.50 each week. After how many weeks will Arie and Olga have the same in their accounts?

How do you graph quadratic equations?

Expand and simplify 5 (X-3) - 2 (2x+1)

Vertex of the parabola y = (x+4) ^2-1

A bear, awakening from winter hibernation, staggers directly northeast for 15 m and then due east for 15 m.

Find the slope of the line 4x-7y=28

Find the value of k for which the quadratic equation 2x^-kx+=0 have equal roots

Pamela drove her car 99 km and used 9 L of fuel. she wants to know how many kilometers if you can drive with 12 L of fuel. she assumes the relationship between kilometers and fuel is proportional.

Find two consexutive odd integers such that the sum of their square is 650

Joe bought a pair of basketball shoes for $49.99 and 2 packages of sport socks for $4.79 each. How much did he spend altogether?