## Go Mathematics Grade eight Address Key Section cuatro Rates and you can Proportionality

Go Mathematics Grade eight Address Key Section cuatro Rates and you can Proportionality

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## Go Mathematics Degrees seven Answer Key Chapter cuatro Rates and you may Proportionality

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## Device Pricing – Directed Practice – Web page Zero. 120

Question 1. Brandon enters bike races. He bikes 8 $$\frac$$ miles every $$\frac$$ hourplete the table to find how far Brandon bikes for each time interval

Answer: 1 hour: 8 $$\frac$$ + 8 $$\frac$$ = 17 1 $$\frac$$ hour: 17 + 8 $$\frac$$ = 25 $$\frac$$ 2 hour: 25 $$\frac$$ + 8 $$\frac$$ = 34 2 $$\frac$$ hour: 34 + 8 $$\frac$$ = 42 $$\frac$$

Explanation: Divide the number of miles by the number of hours to find the unit rate in miles per hour. 3 $$\frac$$ ? 1 $$\frac$$ = $$\frac$$/$$\frac$$ $$\frac$$ ? $$\frac$$ = $$\frac$$ Convert from improper fraction to the mixed fraction. $$\frac$$ = 2 $$\frac$$ miles per hour

Explanation: Divide the number of pages by the number of minutes to find the unit rate in pages per minute. $$\frac$$ ? $$\frac$$ = $$\frac$$ ? $$\frac$$ = $$\frac$$ Thus Kenny read $$\frac$$ pages per minute.

Explanation: Given that, A garden snail moves $$\frac$$ foot in $$\frac$$ hour. Divide the number of feet by the number of hours to find the unit rate in feet per hour. $$\frac$$ ? $$\frac$$ $$\frac$$ ? $$\frac$$ = $$\frac$$ Therefore A garden snail moves $$\frac$$ feet per hour.

Explanation: Given, A fertilizer covers $$\frac$$ square foot in $$\frac$$ hour. Divide the number of square feet, which is $$\frac$$ by the number of hours, which is $$\frac$$, to find the unit rate in square feet per hour. $$\frac$$ ? $$\frac$$ $$\frac$$ ? $$\frac$$ =$$\frac$$ Convert from improper fraction to the mixed fraction. $$\frac$$ = 2 $$\frac$$ square feet per hour Thus A fertilizer covers 2 $$\frac$$ square feet per hour.

Question 6. Brand A: 240 mg sodium for $$\frac$$ pickle or Brand B: 325 mg sodium for $$\frac$$ pickle. ____________

Answer: Find the unit rates in mg per pickle for each brand by dividing the number of mg by the number of pickles. Brand A: 240 mg ? $$\frac$$ = 240 ? 3 = 720 Brand B: 325 mg ? $$\frac$$ = 325 ? 2 = 650 650 is less than 720 so Brand B has a lower unit rate.

Answer: Find the unit rates in cups per serving by dividing the number of cups by the number of servings. Ingredient C: $$\frac$$ ? $$\frac$$ $$\frac$$ ? $$\frac$$ = $$\frac$$ Ingredient D: $$\frac$$ ? $$\frac$$ $$\frac$$ ? $$\frac$$ = $$\frac$$ $$\frac$$ is less than $$\frac$$, ingredient C has a lower unit rate.