A donut-making machine uses 9.87 kilograms of sugar each hour. How many kilograms of sugar will the machine use in 4 hours?

How much orange juice do you need to make 2 servings of lemony orange slush?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.