Find the value of r so that the line passes through (r, 5) and (3,13) has a slope of 8

Diners frequently add a 15% tip when charging a meal to a credit card. what is the price of the meal without the tip if the amount charged is $39.1039.10 ? how much was the tip?

What is 5 feet into yards

Three numbers have a sum of 68. The second number is 1 less than twice the first. The third number is three times the second. What are the three numbers?

What is the range of this relation? { (-3, 0), (-2, - 5), (-2, 6), (3, 7), (0, - 17) }

64 percent rounds to the nearest

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.