A gift box of cookies has 4 chocolate chip cookies and 7 peanut butter cookies. Use c to represent the cost of each chocolate chip cookie and p to represent the cost of each peanut butter cookie. Write and I simplify an expression that represents the total cost of 5 gift box sets.

If there are 4 chocolate chip cookies and 7 peanut butter cookies in each gift box, you will need to multiply the price, c/p, by the number of cookies. This will give you:

4c + 7p

Now if you wanna find how much 5 gift boxes cost, you'll need to multiply that expression by 5. Put parenthesis around 4c + 7p, and add a 5 before the first parenthesis. That will bring you to the

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.