Solve. (5x + 1)(5x - 2) = 0
A. - 
, 
B. 5, 
C. - 
, - 
D. 
, - 
Answer: A
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The data in the figure below represents the annual salaries of 120 professional mathematicians.
Which of the following values is the best estimate of the standard deviation of this data?
A. $40,000 B. $490,000 C. $5000 D. $70,000 E. $20,000
Solve the problems.In a certain coastal basin, the sea water contains 3.2 grams of salt per 1000 milliliters of water. How many grams of salt would be in 4 liters of the sea water?
A. 1,280 g B. 128 g C. 12.8 g D. 0.128 g
Solve.When making a telephone call using a calling card, a call lasting 6 minutes cost $1.70. A call lasting 13 minutes cost $3.10. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of making a call lasting x minutes.
A. y = -0.2x + 2.9
B. y = 0.2x - 9.9
C. y = 0.2x + 0.5
D. y = 5x - 
Graph the circle with radius r and center (h, k).r = 2; (h, k) = (0, 0) 
A. 
B. 
C. 
D. 