What expression correctly represents twice the sum of four and a number

a . 2(4+n)
b . 2(4n)
c . 2(4)+n
d . 2+(4n)

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?

Andy has $310 in his account. each week, w, he withdraws $30 for his expenses. which expression could be used if he wanted to find out how much money he had left after 8 weeks?

Were only 64 seats. the remaining 6 students had to travel in a separate van. the equation 2b + 6 = 70 represents the given scenario. what does b represent? the number of buses the number of vans the number of students who rode on each bus the total number of students going to the football game