When are there no solutions to an inequality?

Just by looking at y = - x 2 + 1, how do you know that it does not represent a line?

What is the range for the function? { (1, 3), (5, 7), (9, 11) }

What are the horizontal and vertical asymptotes of r (x) = (6x+1) / (16x^2) + 1?

What is b-r-3, when b=9 and r=2

Tracy had a bag of candies, and none of the candies could be broken into pieces. She ate $/frac{1}{3}$ of them and then gave $/frac{1}{4}$ of what remained to her friend Rachel. Tracy and her mom then each ate 15 candies from what Tracy had left.

Fernando surveyed a group of people to find their shoe size and the number of children in their family. He graphed the ordered pairs (shoe size, number of children) for each person.

The sum of x and 9 is divided by 2. That quantity is equal to 3x

Joe has a spinner with labeled 1, 1, 2, 2, 4. If he spins 20 times, how many will be 2?

How do i find the zero of (x-10) (4x-3) = 0

A rectangle has a height of 5x and a width of x + 2, express the area of the rectangle.