Question

Write the solution to the inequality in set-builder notation.
5r + 8 < 63
a. {r | r < 11}
b. {r | r < 15}
c. {r | r < 71}
d. {r | r < 8}

Answer 1

separate r and take constants to right hand side and see what you get

Answer 2

sub in each number for r(11,15,71,8) and select the closest value