Shari started to use the grouping method to factor the expression x2 + 5x − 84 as shown. Which expression could be the next step in completely factoring the expression?

A.
x(x + 12) − 7(x + 12)
B.
x(x + 12 − 7) − 84
C.
x(x − 12) + 7(x − 12)
D.
x2 + 12x + 7(x − 12)

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.