Is this a function or not a function

Choose an expression that is equivalent to 4 (x+3)

You have a gift card for a coffee shop worth $90. Each day you use the card to get a coffee for $4.10. Write an explicit formula to represent the amount of money available as an arithmetic sequence.

One quart of fertilizer covers 300 square feet. To the nearest whole number, how many quarts will Danielle need to cover her entire garden? Measurements are 20 feet and 24 feet wide.

A members only speakers series allows people to join for $6 and then pay for $10 for every event attended. What is the total cost for someone to attend 3 events?

Solve this equation 1/8x=-4,200

What is the numerical expression of 3 divided by the product of 6 and 5

List characteristics of a rhombus sides diagonals angles

F (X) = X+3 g (X) = ? gf (X) = x²+6x+2

X - 62,500 = 0.25y; If a total of 125,000 people voted, how many votes did Maya receive?

If there are 1000 grams in a kilogram in 454 grams in a pound how many pounds are there in a kilogram?