What is the frequency for the interval 86–89 in this histogram? 80, 82, 83, 83, 84, 85, 85, 85, 86, 87, 87, 88, 88, 88, 87, 86, 87, 88 a. 2 b. 6 c. 10 d. 12

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

Measures of the angle of r, 31 s (x+4) t (3x+9)

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.