7th Math 3.8

Last updated over 2 years ago

6 questions

7th Math 3.8

Last updated over 2 years ago

6 questions

Math - [Lesson 3.8]
Teacher: Mr. Kovalik (408) 314-1092
Objective and Summary:
SWBAT write and solve equations for a variety of real-world situations with multiple unknown values

Laps--A basketball court on campus is a large rectangle. When Mr. Hernandez makes 7th graders run around the court, they each run a total of 240 feet.
The length of a court is twice the width of the court.

Write and solve an equation to find the length of a basketball court.

"The length of a basketball court is..."

You MUST SYW on Formative

CFS:
#1: Defines ONE appropriate variable for two unknowns
#2: Accurately writes equation
#3: Accurately solves equation using inverse operations

Bike Shop--Barry's mountain bike weighs 6 pounds more than Danny's. If their bikes weigh 42 pounds altogether, how much does Barry's bike weigh?

Write and solve an equation.

"Barry's bike weighs..."

CFS:
#1: Defines ONE appropriate variable for two unknowns
#2: Accurately writes equation
#3: Accurately solves equation using inverse operations

MEDIUM PROBLEMS

Snacks--Mr. Kovalik loves Takis and Cheez-Its (white cheddar, specifically). One bag of Takis and one box of Cheez-Its cost a total of $4.50.
If a box of Cheez-Its is double the price of a bag of Takis, how much did each item cost?

Write and solve an equation.

"A bag of Takis cost..."
"A box of Cheez-Its cost..."

CFS:
#1: Defines ONE appropriate variable for two unknowns
#2: Accurately writes equation
#3: Accurately solves equation using inverse operations

K9--Mr. Kovalik's cousin has a dog named Saint. She wants to build a play pen that has a perimeter of 15 feet. She will build it so that the width is half the length.
What must the width of the play pen be?

Write and solve an equation. It may help to draw a diagram of the play pen and label it first.

"The width of the play pen..."

SPICY--Try if you have time.

VFD--Julia, Keller, and Israel are volunteer firefighters. On Saturday, the volunteer fire department held its annual fundraiser. After one hour, Keller had collected $42.50 more than Julia, and Israel had collected $15 less than Keller.
The three firefighters collected $125.95 in total.

Write and solve an equation to find how much money each person collected.

(Hint: If you're not sure how to start, use the variable j for the amount of money Julia collected. The other two can be compared to j)

Map--Mr. Kovalik's old college campus was basically a giant rectangle. The perimeter of the campus is 12 miles.
He knows the length is three times the width.
How wide is the campus?

Define your variable, write an equation, and solve.

"The campus is... "

You MUST SYW on Formative

CFS:
#1: Defines ONE appropriate variable for two unknowns
#2: Accurately writes equation
#3: Accurately solves equation using inverse operations

Great job! Today's concept with variables is tricky. You can now:

1) Work on the new starred skills for expressions and equations

2) Work on IXL/Khan