Jack worked 8 hours and Caleb worked 10 hours. Their combined pay was $80. When Jack worked 9 hours and Caleb worked 5 hours, their combined pay was $65. Find the hourly rate of pay for each person. Solve by elimination.

Harry the hook has 7 1/3 pounds of cookie dough. she uses 3/5 of it to bake cookie. how much cookie dough does she use to make cookie?

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.

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.