If you don't know these, these are called the diamond problems. there are two numbers on each side, and in the bottom box, it is the sum of adding them together, and in the top box, it is the sum of multiplying together. i have no idea about #'s, a, b, and f, can you guys me? !

What is the value of x? enter your answer in the box. photo attached.

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.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?