Expressions, Equations and Inequalities

• The temperature begins at 12 degrees below zero and falls five degrees each hour to reach thirty-two degrees.  How many hours did it take the temperature to reach thirty-two degrees?

• The temperature begins at 12 degrees below zero and rises five degrees each hour to reach thirty-two degrees.  How many hours did it take the temperature to reach thirty-two degrees?

• The temperature begins at 5 degrees and falls 12 degrees each hour to reach thirty-two degrees.  How many hours did it take the temperature to reach thirty-two degrees?

• The temperature begins at 5 degrees and rises 12 degrees each hour to reach thirty-two degrees.  How many hours did it take the temperature to reach thirty-two degrees?

• Malina earns $9.25 per hour babysitting.  She needs $85 to attend a concert.  If she spends at most $120 on clothes at the mall, how many hours must Malina work to be able to afford the concert?

• Malina babysits for 9.25 hours.  She needs a maximum of $85 to attend a concert.  If she spends $120 on clothes at the mall, how much money must Malina earn per hour to be able to afford the concert?

• Malina earns $9.25 per hour babysitting.  She needs a minimum of $85 to attend a concert.  If she spends $120 on clothes at the mall, how many hours must Malina work to be able to afford the concert?

• Malina babysits 9.25 hours.  She needs more than $85 to attend a concert.  If she spends $120 on clothes at the mall, how much money must Malina earn per hour to be able to afford the concert?

Which best represents the inequality and solution to the sentence below?
The quotient of a number and -4 decreased by 5 is at most 15.

• 36

• 34

• 32

• 24

Which expression is equivalent to 6(3y - 2y + 7)?

• 18y + 7

• 21y - 14y + 7

• 18y + 42

• 6y + 42

(6x + 3y + 4) – (x + y – 5)

• 5x + 2y + 9

• 7x + 2y + 9

• 7x + 4y + 9

• 5x + 2y -1

An inverse operation is

• reversing the sign in an inequality

• using the opposite operation to solve equations

•  A number’s distance from zero

Like terms are 

• numbers or same variable raised to the same power

• equal numbers

• only unknown values

One difference between equations and expressions would be...

• you solve both of them using inverse operations.

• you flip the symbol when you multiply or divide by a negative

• equations have an equals because they show two equal expressions. Expresions have terms and operations.

When solving an inequality, what is the main things that are different from solving equations.

• Draw the line

• Use inverse operations to solve.

• Bring down the inequality symbol and FLIP the symbol  when you multiply or divide by a negative.