Which equation represents a linear function?

Equation 1: y = 2x^2 + 1

Equation 2: y^2 = 3x + 1

Equation 3: y = 5x - 1

Equation 4: y = 4x^4 - 1

If Quinn tosses a fair coin and then rolls a fair number cube labeled 1 through 6, what is the probability of tossing heads followed by rolling a number less than 4?

Melanie and her cousin Grace are arguing about who is the faster swimmer. Grace: 325 m in 5.5 min Melanie:300 m in 5 min

A cell phone plan costs $27.90 per month for 400 minutes of talk time. It costs an additional $0.06 per minute for each minute over 400 minutes. To get e-mail access, it costs 20 % of the price for 400 minutes of talk time.

John is a High School principal. He earns $62,299.92 a year and is paid on a semimonthly basis. How much is deducted per pay period for Social Security? How much for Medicare?

Suppose that two cards are randomly selected from a standard 52-card deck. (a) What is the probability that the first card is a club and the second card is a club if the sampling is done without replacement?

Complete the equation of the line through (2,-2) and (4,1). Use exact numbers.

The distance between two towns is 15 miles. There are 20 distance markers evenly spread throughout the road between the towns. Jessie drove 45 of the distance when she was forced to stop because she ran out of gas.

A parking space shaped like a parallelogram has a base of 18 feet and a height is 7 feet. A car parked in the space is 15 feet long and 5 feet wide. How much of the parking space is not covered by the car?

What is the addition of x - 7=12

It take Dan 32 minutes to complete 2 pages of homework. T this rate, how many pages does he complete in 200 mins?