Question

Write the solutions of each inequality in set-builder notation.
16. 7 - 3d ≥ 28
(Please help me, I've been absent from my class for a few days, and I have no idea how to do this.)

Answer 1

-3d + 7 >= 28
The first step is to subtract 7 from both sides.
-3d >= 21
then divide by -3, and flip the sign since you are dividing by a negative ( the same rule applies when multiplying by a negative)
d <= -7