Which of the following expressions represents a function?

y = x2

{ (9, 2), (4, - 2), (5, 3), (9, - 4) }

x = - 3

x2 = 25 - y2

2+2*7:2+8+1*2456789

What is 120.00 divide by 7.75

An oil companys fills 1/10 of a tank in 1/5 hour. At this rate, which expression can be used to determine how long it will take for the tank to fill completely?

TJ solved a quadratic equation. His work is shown below, with Step 3 missing. What could TJ have written as the result from Step 3? 2 (x+6) 2 - 5 = 45 2 (x + 6) 2 = 50 Step 1 (x + 6) 2 = 25 Step 2 Step 3 =-11 or r=-1 Step 4

What is 1/3 of twenty one pounds

Express 1507 million in a standard form

Which are samples that are appropriate to survey regarding how the city's residents feel about building a new youth center? Select all that apply. - 10 names selected from the city phone book.

Carlos made n soccer goals last weekend and 4 more this weekend. Using n, write an expression for the number of soccer goals Carlos made during the past two weekends.

A product design team is working on a new drink box, will hold 225 cubic centimeters of juice. The box is 12.5 centimeters high and 4.5 cm long. What is the width of the box

Find two consecutive numbers less than 100, for the first of which the sum of the digits is 8, and the second is divisible by 8.