Printer ink cartridges cost $19 each. The company that sells the ink cartridges charges a flat rate of $7.50, no matter how many ink cartridges you buy.

Question

Write an algebraic expression that describes the total cost for a single order of `x`, cartridges.

HINT: Use the table to help you write the expression

Answer 1

The total cost for a single order of x cartridges can be expressed as:

Total cost = (cost per cartridge * number of cartridges) + flat rate charge
Total cost = (19 * x) + 7.50

Answer 2

`5x^{2}+2y` when `x\ =\ -3` and `y\ =0.25`.

Answer 3

To evaluate the expression `5x^2 + 2y` when `x = -3` and `y = 0.25`, we substitute these values into the expression:

(5 * (-3)^2) + (2 * 0.25)

Now, let's simplify this expression:
(5 * 9) + (0.5)
45 + 0.5
45.5

Therefore, when `x = -3` and `y = 0.25`, the expression `5x^2 + 2y` equals 45.5.