Factor the expression completely. If the polynomial is prime, state this as your answer.x4 - 49
A. (x2 + 7)(x2 - 7)
B. prime
C. (x2 - 7)2
D. (x2 + 7)2
Answer: A
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Solve the problem.A church steeple casts a shadow 111 ft long, and at the same time a 9-ft post casts a shadow 6 ft long. How high is the steeple? Round your answer to the nearest foot, if necessary.
A. 167 ft B. 9 ft C. 74 ft D. 120 ft
Solve the following system by any appropriate method. If there is no real number solution, so state.xy = 1-20x - y = -9
A. (
, 4), (
, 5)
B. (-4, 4), (-5, 5)
C. (4, 
), (5, 
)
D. no real solution
Solve the problem.The sum of the ages of Art, Ben, and Cal is 59. Art is 1 year older than Cal and Cal is 1 year younger than Ben. Which of these people were teenagers 7 years ago?
A. Art and Ben B. Art C. Art, Ben, and Cal D. Ben
Solve the problem. Express the answer in scientific notation to two decimals.The national debt of a country is $31,570,000,000 and the population is 4,510,000. What is the debt per person? Write answer without exponents.
A. $142,380,700 B. $700 C. $7000 D. $70,000