Express using algebra.

a. A movie theater has a rows, and b seats in each row. How many seats are in the theater?

b. A teacher handed out m notebooks which came in packs with c notebooks in each pack. How many packs were there?

c. A truck has a total of a pounds of fruit in boxes. How many boxes are on the truck if there are n pounds of fruit in each box?

d. What is the length of a rectangle whose perimeter is P, if the width is 6?

e. What number is 7 more than twice as much as x?