Consider the quadratic function

f (x) = x^2-8x-9

Vertex: (-b/2a, f (-b/2a))

What is the vertex of the function (__,__)

Shane has 2 white shirts 2 blue ones and 1 red one. He has gray pants and black pants. He hung them all up in his closet, but one shirt and a pair of pants fell on the floor. The probability that a red shirt and black slacks are on the floor is

A scale drawing of a rectangular room has a length of 6 inches and a width of 4 inches. The drawing uses a scale of 1 inch to 3 feet. Find the cost to carpet the room if carpeting costs $5 per square foot.

A turkey eats 4 scoop of feed each day. If he spills 1/3 of scoop from his bowl while eating, how much feed does he actually eat in a day? how much does he eat in two days?

To use your debit card at a pay-at-the-pump system, you have to enter a four-digit personal identification number (PIN). How many different possible PINs can be formed on the 10-digit keypad? (Repetition is not allowed.)

Write a word problem that involves combined rectangles. Include a diagram and the solution.

Like terms 4x + 2x + 7x

Determine whether quantities vary directly or inversely and find the constant of variation. A rectangle has length 72 cm and width 56 cm. The other rectangle has the same area as this one, but its width is 21 cm. Find its length.

Mario and Bowser begin with a hat that has 5 balls in it: 3 are red, 2 are green. Bowser secretly picks a ball and tells Mario it is red, although he might be lying about the color.

The greatest amount of money kiara has to spend $20. she wants to buy a book for $12 and spend the remaining money on name tags for her luggage. Each name tag $12 cost $2. how many number of tags, x, kiara can buy for her luggage?

Jonas is planning to use part of the land behind his house to have a soccer field. Jonas plots his soccer field plan on a grid. A side of each square on the grid is equal to two meters.