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Open Up - Grade 7 - Mathematics - Unit 2 - Lesson 4

By Formative Library
Last updated about 3 years ago
6 Questions

A certain ceiling is made up of tiles. Every square meter of ceiling requires 10.75 tiles. Fill in the table with the missing values.

On a flight from New York to London, an airplane travels at a constant speed. An equation relating the distance traveled in miles,d , to the number of hours flying,t , is t =\frac{1}{500}d.

How long will it take the airplane to travel 800 miles?

Each table represents a proportional relationship. For each, find the constant of proportionality, and write an equation that represents the relationship.

Constant of proportionality:
Equation: P =

Each table represents a proportional relationship. For each, find the constant of proportionality, and write an equation that represents the relationship.
Constant of proportionality:
Equation: C =

A map of Colorado says that the scale is 1 inch to 20 miles or 1 to 1,267,200.

Are these two ways of reporting the scale the same?

Here is a polygon on a grid.

  1. Draw a scaled copy of the polygon using a scale factor of 3. Label the copy A.(show your work)
  2. Draw a scaled copy of the polygon with a scale factor . Label it B.(show your work)
  3. Is Polygon A a scaled copy of Polygon B? If so, what is the scale factor that takes B to A? (short answer)

"Source: Open Up Resouces (Download for free at openupresources.org.)"