Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score does he need on his next test to raise his average to 85?

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

answer: approximately 206 bones

i hope this u out a branlist and a would be greatly appreciated :

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed