Solve the problem.The Smith family is planning a 576-mile trip. If they travel at an average speed of 48 miles per hour, what will be their travel time? (Use d = rt)
A. 11 hr.
B. 12 hr.
C. 14 hr.
D. 13 hr.
Answer: B
Mathematics
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Solve.In a state with a population of 9,000,000 people, the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state? Write your answer in scientific notation.
A. $5.4 × 1010 B. $5.4 × 109 C. $54 × 1010 D. $54 × 1011
Mathematics
Find the product.(3x - 1)(3x + 6)
A. 6x2 + 15x + 15 B. 9x2 + 15x - 6 C. 6x2 + 15x - 6 D. 9x2 + 15x + 15
Mathematics
Simplify by combining like terms.4a + 2 - 2a
A. -2a + 2 B. 4a C. 2a + 2 D. 6a + 2
Mathematics
Determine if the statement is a proportion.I. 
II. 
A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.
Mathematics