Writing Equations and Inequalities

Writing Expressions

• Identify numerical values
• Identify unknown values (define your variables)
• Decide if there is a constant (thing that doesn't change)
• Decide if there is a coefficient (thing that changes based on variable)

Hyrum eats 5 fruit snacks each week.

The Freestone family goes through 2 gallons of milk each week
Sally charges $12 an hour for babysitting plus an additional flat rate of $8 per kid.

Writing Equations

• Determine what your total/End goal is. What goes on the other side of the equal sign?
• Follow steps for writing expressions.

You have had breakfast and lunch today and have eaten 1250 calories. For lunch you ate 750 calories, how many calories did you eat for breakfast?

James earns $15 per hour at his job as a banker. At the end of the week he make $460.65. How many hours did James work?

Brianna has saved $600 to buy a new TV. If the TV she wants cost $1,800 and she saves $20 a week, how many YEARS will it take her to buy the TV?

Writing Inequalities

• Determine the total/other side of the inequality.
• Determine what inequality symbol makes sense with the story.
• Follow the steps for writing equations.

You have to read at least 100 minutes a week for your language arts class. You have only read 24 minutes so far this week. How many more minutes do you have to read to at least meet the requirement?

Andy wants to earn enough to buy a new Buzz Lightyear toy that coast $49.99. He mows lawns for $5 per lawn. How many lawns will he need to mow to earn enough money for the Buzz Lightyear toy?

Rob bids a plumbing job for $305. He charges $30 an hour and will spend $230 on parts. In how many hours does he need to finish the job so he wont go over his bid?