Find the value of r so that 16 - r(1/3x + 2.5) - 2x is equivalent to -5x - 6.5

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

Place the following steps in order to complete the square and solve the quadratic equation,

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10