Exploring Rational Expressions: Addition and Subtraction

The video tutorial covers topic nine from the orange unit 2 packet, focusing on scale and proportion. It begins with a review of scale and proportion concepts, followed by solving a problem involving a Polaroid photo and its scale. The tutorial then moves on to calculating the dimensions of a studio apartment floor plan using a given scale. Finally, it demonstrates how to find the perimeter and area of the floor plan. The video emphasizes the importance of understanding how changes in dimensions affect area and perimeter.

What should you have ready before starting the lesson?

• A ruler and eraser

• A pencil and calculator

• A notebook and pen

• A textbook and highlighter

What is the scale used for the Polaroid photo?

• 1 inch equals 3 feet

• 1 inch equals 1 foot

• 1 inch equals 1/2 foot

• 1 inch equals 2 feet

Tags

CCSS.7.G.A.1

How do you find the new height of the Polaroid photo?

• Subtract the scale factor from the original height

• Divide the original height by the scale factor

• Add the original height to the scale factor

• Multiply the original height by the scale factor

What is the new width of the Polaroid photo?

• 4.5 feet

• 5 feet

• 4 feet

• 3 feet

Why did Ralph's calculation of the area result in 18 square feet?

• He used the area in inches squared in the scale

• He used the wrong scale factor

• He forgot to multiply by the scale factor

• He used the wrong dimensions

Tags

CCSS.7.G.A.1

What are the dimensions of the studio apartment floor plan?

• 6 inches by 9 inches

• 8 inches by 11 inches

• 9 inches by 12 inches

• 7 inches by 10 inches

What is the scale listed on the floor plan?

• 1 inch equals 5 feet

• 2 inches equals 7 feet

• 3 inches equals 8 feet

• 4 inches equals 9 feet

Tags

CCSS.7.G.A.1

What is the actual size of the shorter side of the floor plan?

• 21 feet

• 20 feet

• 19 feet

• 18 feet

Tags

CCSS.8.EE.B.6

How do you calculate the perimeter of a rectangle?

• 2 times the length plus 2 times the width

• Add the length and width

• Multiply the length and width

• 2 times the length minus 2 times the width

Tags

CCSS.4.MD.A.3

What is the area of the actual floor plan?

• 661.5 square feet

• 621.5 square feet

• 641.5 square feet

• 600.5 square feet