Simplify.3(x + 5.5) = 7x + 5.7
A. 14.8
B. -0.05
C. 2.7
D. -10.8
Answer: C
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Solve the problem.A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his rate when he was riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?
A. Bike: 13 mph Hike: 3 mph B. Bike: 14.5 mph Hike: 4.5 mph C. Bike: 12 mph Hike: 2 mph D. Bike: 11.5 mph Hike: 1.5 mph
Determine the population and the sample.Each month a pollster questions by phone a random sample of about 10,000 people aged 21 and older living in Country X on political topics.
A. Population: 10,000 people aged 21 and older living in Country X; Sample: 21 people who get questioned B. Population: all people living in Country X; Sample: 21 people who get questioned C. Population: 10,000 people living in Country X; Sample: 21 people who get questioned D. Population: people aged 21 and older living in Country X; Sample: 10,000 people who get questioned
Find the solution to the system of equations by substitution.
A. (5, 3) B. (3, 5) C. (-5, 3) D. (-19, 3)
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.The gross domestic product (GDP) is the total national output of goods and services valued at market prices within the United States. In a certain year, the GDP of the United States was$6,660,000,000 and the population was 2,398,000. On average, how many dollars of goods and services were produced by each individual during that year?
A. $2.78 × 103 B. $27.80 C. $2.78 × 106 D. $2.78