1. the phrase "the difference of two times a number m and seven "when translated to mathematical expression is_
a. 2m + 7
b. 2m ÷7
c. 2(m-7)
d. (2m-7)

2. what is the equivalent expression of the phrase "the sum of twice a number w and nine "?
a. 2w+9
b. (2+w+9)
c.2(w+9)
d. 2w-9

​