Aprinting service charges a set-up fee of $9.50 for each order and 20 cents more for each copy. the total cost, c (in dollars), for an order of x copies.

what is the total cost for an order of 40 copies?

17.5

Step-by-step explanation:

9.5+20*40

$17.50

Step-by-step explanation:

This problem can be written as a function C(x), the cost for "x" number of copies.

The constant, or flat fee, is $9.50 because this cost will always be there no matter how many copies you order.

The rate is 20 cents, or 0.20 for every "x".

Write this as a function:

C(x) = 0.20x + 9.50

To find the cost of an order of 40 copies, substitute x for 40 in the function.

C(x) = 0.20x + 9.50

C(40) = 0.20(40) + 9.50

C(40) = 8 + 9.50

C(40) = 17.50

*Remember to always write money with two decimals.

The cost is $17.50.

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation:

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart