Algebra problem....help plzzzzzzzzz?
1. Coin Problem. A vending machine contains dimes and quarters only. There are 4 more dimes than quarters. If X represents the number of quarters, write an algebraic expression in terms of X that represents the value of all the coins in the vending machine in cents. Simplify the expression.
2. Construction. A rectangular open-topped box is to be constructed out of 9- by 16-inch sheets of thin carboard by cutting x-inch squares out of each corner and bending the sides up. Express each of the following quantities as a polynomial in both factored and expanded form.
A. the area of cardboard after the corners have been removed.
B. The valume of the box.
Comments
1. The number of cents in the dimes can be expressed as 10(x + 4).
2. The area of the four cutouts can be expressed as 4x^2. The area of one sheet of the cardboard is 9*16. The long side of the box is (16 - 2x).
That should be a good start.