Melanie lends half her collection of formal dresses to her sister, Etel. Melanie then buys 4 more dresses. If she has 12 dresses now, how many dresses did Melanie have initially?

Write as an algebraic expression: five times a number

Write as an algebraic expression: seven less than a number

Suppose a was Clare's age 12 years ago. Write an expression for Clare's age now.

Write as an algebraic expression: 11 increased by a number

Clare buys organic almonds priced at $77 from the grocery store. How much did she pay the cashier, if she received $23 in change?

Collect like terms: 3a + 2b + 5a + 7b

Write as an algebraic expression: twice a number

Suppose x is the amount of money Raquel earned on Monday, and she earned twice that amount on Tuesday. Write an expression for the amount Raquel earned on those two days.

A bus left NY @ 11 pm w/ 44 passengers. Later, some passengers got off @ NJ. The # of passengers who boarded the bus @ NJ were twice the # of passengers who got off the bus. The bus had 50 passengers now. How many passengers got off @ NJ?

Collect like terms: 15m squared + 12m + 4m squared

Use the distributive property to write an equivalent expression: (5a - 3b + 8)4