F (x) = { (1, 4), (2,3), (5,8), (4,7) } Is f^-1 (x) a function and why?

Rachel purchases a prepaid phone card for $15. Long distant calls cost $.21 a minute using this card. Rachel used her card only wants to make a long distance call. If the remaining credit on your card is $9.54 how many minutes did her call last?

What quantity of apples would you need to make a triple recipe? 2 1/4 cups apples 2 cups sugar 2 3/4 cups flour 1 teaspoon oats 1 1/4 cups butter 2 teaspoons cinnamon Write your answer in simplest form, using a slash (/) to separate the numerator

Use addition or subtraction to solve this problem. The lodge at the Three Lakes Resort is offering these two options for a holiday weekend: Option 1: 3 nights including six meals for $132.00 Option 2: 3 nights including two meals for $109.

you run 1 mile in 8 minutes at a constant speed. How far do you run in 1 minute? write an equation to represent how far you can run in x minutes. Explain how you can use your equation to find how far you can run in 11 minutes.

Write the converse, inverse, and contrapositive. Determine if it is true or false. if false provide a counterexample If you win the league championship game, then you win the league trophy.

What is the answer to these 9 + 9n = 9

Solve each problem. Determine which choice (or choices) best represent the equation: 10 is 5 times as many as 2 (A) 5 + 5 = 10 B. 5 * 5 = 10 C. 5 x 2 = 10 D. 10 = 2 x 5

Evaluate the expression for x = 4 1/3 9x + 4 A) 39 B) 40 C) 43 D) 52

Tom rented a truck for one day. There was a base fee of $16.99, and there was an additional charge of 90 cents for each mile driven. Tom had to pay $190.69 when he returned the truck. For how many miles did he drive the truck?

What are the advantages of using an algebraic expression to represent a pattern rule, compared with describing the pattern in words?