On saturday, the bookstore sold x books.
on sunday, the bookstore sold 2 more books than on saturday.
which expression represents the total number of books sold over the weekend?
a. 2x
b. x+2
c. 2x+2
d. 2(x+2)

x = books were sold on Saturday.

Because 2 more books were sold on Sunday than on Saturday, therefore

(x + 2) books were sold on Sunday.

The total number of books sold over the weekend (Saturday and Sunday) is

x + (x+2)

= x + x + 2

= 2x + 2

2x + 2

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours