Given the isosceles triangle below, solve for both x and y. 580
7x - 15
3x + 17
2y +7 3y - 20

7x+8y=-18, 4x-9y=-3 solve the system of equations

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.