To measure the distance (DC) across a pond, a surveyor takes points A and B so that AB is parallel to DC . If AB = 60 feet, EB = 48 feel, and ED = 80 feet, find DC .

To travel 1200 miles in their recreational vehicle, the Steiners paid a total of $\$450$ for gas, at an average fuel cost of $\$3.00$ per gallon.
What was the vehicle’s average mileage during the trip?

At a certain time of the day, a man 6 feet tall, casts his shadow 8 feet long. Find the length of the shadow cast by a building 45 feet high, at the same time which is next to the man.

Square of $\left(a^{2}+a^{3}\right)$ is:

Which of the following expressions is equivalent to $(x+2)(x-2)$?

Which 15-minute mileage markers indicate a car traveling 60 mph?

The ratio of boys and girls in a class is 3:5. If the class contains 24 students, how many more boys must be enrolled to make the ratio 1:1?

What is the greatest common factor of 48 and 120?

Chikita made three long-distance calls. According to her phone bill, the calls were 19 minutes, 24 minutes, and 8 minutes in length. If Chikita pays 9 cents per minute on all long-distance calls, how much was she billed for the three calls?

Identify the values of x that will make this rational expression $x^{2}+2 x-15$