Solve the system of equations.
3x = ­-31 + 2y
5x + 6y = 23
a. x = ­-5, y = 8
b. x = ­- 29, y = ­- 28
c. no solution
d. infinite solutions

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

According to the data set, where should the upper quartile line of the box plot be placed?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?