Which of the following relations is a function?

{ (-2, 4), (-1, 3), (5, 2), (1, 4) }

{ (1, 7), (1, 8), (2, 7), (3, 8) }

{ (2, 4), (4, 6), (4, 8), (6, 4) }

{ (5, 7), (6, 3), (8, 6), (5, 4) }

One lunch table can hold 10 students. There are 60 students in 3rd grade. How many lunch tables are needed so that every student in 3rd grade can eat lunch at the same time?

Which of the expressions can you use to find the number of 3-digit passwords you can make using the digits 5, 6, and 7, if you do not repeat any of the digits? 3 x 2 x 1 3 + 2 + 1 5 x 6 x 7 5 + 6 + 7

Which step should be done first to solve the equation for x? 2 (x - 2/3) = 5/6 A. Multiply both sides of the equation by 2. B. Divide both sides of the equation by 2. C. Subtract 2 from both sides of the equation. D.

The radius of a solid hemisphere is 2r. Find its total surface area

A car manufacturer rolled out a new car priced at $10,000, but not many people bought it. In the context of supply and demand, how might the price of the car be affected?

What is the area of the triangle shown below? (units squared) Dimensions: 5, 5, 8

jennas mom is making hair bows for the basketball team. it takes 39 inches of ribbon to make each bow. how many yards of ribbon will she need to make 9 bows?

Mandy is setting up for a reception. For the number of seats needed, she knows she can use either 8 seats at each table with none leftover or 10 seats at each table with none left over. Which is the least number of seats she is setting up? A. 40 B.

Supposed the population of deer in a region was 3,500 in the year 2000. since then population has grown by 3.5% annually.

How are common denominators and common multiples the same