What is the answer to - (2 - 7x) if you simplify

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Which of the following is another way to express the difference between -5 and 8?

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.