Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. find all solutions whenever they exist.
x + 3y = 9
3x –y = 7

What is the approximate circumference of the circle shown below?

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price