A. This implies 3(x-7)+10 since the dofference is the result of a subtraction problem. This is incorrect.
B. 3x-7+10. This is also incorrect since it has minus, which again means subtraction. It also does not account for the parentheses since it multiplies first before subtracting.
C. 3(x+7)+10 This is correct
D. 3x+(7+10) This says the sum of seven and ten, which is 7+10. This does not appear in our desired expression.
Final answer: C
