Two mechanics worked on a car. the first mechanic charged $85 per hour, andthe second mechanic charged $70 per hour. the mechanics worked for a combinedtotal of 20 hours, and together they charged a total of $1625.how long did each mechanic work?

What is the area of the triangle 10 13 12

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?