Digits, Grade 7, Volume 1, Homework Helper

### 7-6: TEKS Practice

• 1. You and your friend are each drawing a map of your neighborhood. The graph represents the scale you used for your map. The equation y equals , 1 twelfth , x represents your friend's scale, where x is the actual distance in feet and y is the distance on the map in inches. On whose map will a 150-foot driveway be longer?

• 2. At a cookout, Mrs. Crawford makes 8 ninths lb of chicken, plus 1 lb for each guest. Express the relationship between the number of guests x and the number of pounds of chicken y with an equation. Is the relationship between x and y proportional? Explain.

• 3. A map of a city uses the scale 1 cm = 50 m. On the map, Second Avenue is 29 cm long. If there is a traffic cone at the start of Second Avenue and a cone every 5 m along the road, how many traffic cones are there in all?

• 4. A recipe calls for 15 oz of flour for every 8 oz of milk. Let x be the amount of milk used. Let y be the amount of flour used.

• a. Express the relationship with an equation.

• b. Is the relationship between x and y proportional?

• c. If you use 15 oz of milk, how much flour should you use? Simplify your answer.

• 5. The blueprint in Figure 1 is a scale drawing of an apartment. The scale is 1 in. ∇ 10 ft. Would a painting 5 , and 1 half ft wide fit on the narrowest wall of the living room? Explain.

• 6. The blueprint in Figure 1 is a scale drawing of an apartment. The scale is 1 in. ∇ 8 ft. The walls are 8 ft high. You want to paint the narrowest wall of the living room. Each can of paint covers 150 ft2 and you can buy only a whole number of cans. At least how many cans should you buy?

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