To write:an expression forthe total cost to have photographs taken and the cost of purchasing twelve portrait sheets.

Answer to Problem 30PPS
The algebraic expression is
Explanation of Solution
Given:
A studio charges a sitting fee of $25 plus $7
Calculation:
Let "p" represents the total number of sheets ordered.
The extra cost (other than $25) for one portrait sheet is $7, then the extra cost for these p portrait sheets will be will be p times 7
The word “plus" indicates addition.
So, the phrase "a sitting fee of $25 plus $7 for each portrait sheet ordered" can be translated into the algebraic expression
To find the cost of 12 portrait sheets, we replace p by 12 in the expression
Thus, we have that
Now, by the rules for order of operations, we have that we have to first multiply and then add.
Thus, the total cost of 12 portrait sheets is $109
Conclusion:
Thus, the algebraic expression is
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