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FoxGirl1971
30.10.2019 •
Mathematics
The typical family on the planet econ consumes 10 pizzas, 7 pairs of jeans, and 20 gallons of milk. in 2016, pizzas cost $10 each, jeans cost $40 per pair, and milk cost $3 per gallon. in 2017, the price of pizzas went down to $8 each, while the prices of jeans and milk remained the same. between 2016 and 2017, a typical family's cost of living: a. increased by 4.5 percent. b. decreased by 4.5 percent. c. remained the same. d. decreased by 20 percent.
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Ответ:
The correct option is B. decreased by 4.5 percent.
Step-by-step explanation:
Consider the provided information.
The typical family on the Planet Econ consumes 10 pizzas, 7 pairs of jeans, and 20 gallons of milk. In 2016,
In 2016, pizzas cost $10 each, jeans cost $40 per pair, and milk cost $3 per gallon.
Cost of living in 2016 = 10×$10+7×$40+20×$3
= $100+$280+$60
= $440
In 2017, the price of pizzas went down to $8 each, while the prices of jeans and milk remained the same.
Cost of living in 2017 = 10×$8+7×$40+20×$3
= $80+$280+$60
= $420
Change in cost of living is:
Here minus sign represents decreased.
Hence the cost of living is decreased by 4.5 percent.
Therefore, the correct option is B. decreased by 4.5 percent.
Ответ:
d) 2/1 is the answer