Toby buys a new mp3 player for a price of 45.50. what is the total amount his credit card is charged if the sales tax is 7%

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?