What is the y-value of the vertex of the function f (x) = - (x - 3) (x + 11) ?

The y-value of the vertex is

You buy a new video game for $59.99. The sales tax is 8%. What is the total cost for the game including sales tax?

Does anyone understand 4.05 f (x) = 3 (4)

Sue a tollbooth worker is paid $12.50 per hour between 8 Am and 4 pm. After 4 pm she is paid $14.25 per hour. If Sue works from 10 am to 6 pm one particular day how much money does she earn that day?

Linda will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of $47.96 and costs an additional $0.16 per mile driven. The second plan has an initial fee of $55.96 and costs an additional $0.

N is an integar. Write the values of n such that - 15<3n<6

Find all values of x such that sin 2x = sin x and 0 ≤ x ≤ 2π. (enter your answers as a comma-separated list.)

Which rectangular equation is equivalent to the polar equation r cos theta = - 2

How do I find the answer to 0.008 is 1/10 of

Write the following proportions using colons 7 is to 21 as 3 is to 9

With a tail wind, a plane traveled 840 miles in 3hrs. With the same wind as a head wind, the return trip took 30 minutes longer. Find the plane's airspeed (in still air) and the wind speed ... So lost smh