Solve the Triangular Prism

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

What does the sign of the slope tell you about a line?