joan worked 6 hours on monday, 4 hours on wendsday and hours and 8 hours on friday. her gross pay for all 3 days was $130.50. what was her hourly rate

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.