Micheal is 3 times as old as alex. 18 years ago, micheal was 9 times as old as alex. how old is micheal now?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.