Which quadratic function opens down and has a vertex with a negative y value?

A. f (x) = 5x^2-18

B. g (x) = - 4x^2+7x+20

C. h (x) = - 1/2 (x-9) ^2+1

D. j (x) = - 10 (x+6) ^2 - 3

What is 4 out of 3 rounded to 1 decimal place

What are the domain and range of the exponential function below? F (x) = 4x + 3 A. Domain: All real numbers greater than 0 Range: All real numbers greater than 0 B. Domain: All real numbers Range: All real numbers greater than 3 C.

At the fair, a ticket for the giant roller coaster costs $3 for an adult and $2 for a child under twelve. The chart below gives the total number of people who rode the roller coaster over the last two days.

Which algebraic expression is a polynomial? Answers- 4x^2 - 3x + 2 over X -6x^3 + x^2 - the square root of 5 8x^2 + the square root of X -2x^4 + 3 over 2x

If a triangle has one angle that measures 51° and one angle that measures 39°, what kind of triangle is it?

For which of these ARMs will the interest rate stay fixed for 4 years and then be adjusted every year after that?

Annie opened a savings account and deposited $10. If the balance in her account doubles each month, what is the account balance after 4 months?

The giraffe is 15 feet tall. she is 2 1/2 times as tall as the elephant. how tall is the elephant?

What is the sum or difference? 6x7 + 8x7

What is the vertex of the function f (x) = x^2 + 16x?