Solve. Simplify the answer.Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 10 hours. If he trained for 3
hours on the first day and 1
hours on the second day, how many hours would he need to train on the third day?
A. 5
hr
B. 5 hr
C. 5
hr
D. 4
hr
Answer: D
Mathematics
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The velocity of a sky diver t seconds after jumping is given by  figure 1.png)
. After how many seconds is the velocity 50 ft/s?
(a) 5.0 s (b) 4.9 s (c) 8.9 s (d) 0.2 s (e) none of these
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Multiply. Simplify, if possible.-(5a)
A. 5a B. 5 - a C. -5a D. 5
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Solve the equation by using the square root property. Simplify all radicals.3n2 - 189 = 0
A. {7
}
B. {±3
}
C. {9
}
D. {±9
}
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Graph the point symmetric to the given point.Plot the point (-6, -9), then plot the point that is symmetric to (-6, -9) with respect to the x-axis.
A. 
B. 
C. 
D. 
Mathematics