For which set of lines is it reasonable to state that the two lines are almost perpendicular to each other?
a. y = 2.1x 3, y = 2.1x 5
b. y = 0.9x 5, y = -1.26x 8
c. y = 5x 1.25, y = -5x 1.25
d. y = 3/4x 0.28, y = 4/3x 0.29

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

Which number completes the inequality? 2/3 < _ < 7/9