Solve the problem.A piece of land is shaped like a right triangle. Two people start at the right angle of the triangle at the same time, and walk at the same speed along different legs of the triangle. If the area formed by the positions of the two people and their starting point (the right angle) is changing at 
then how fast are the people moving when they are 
from the right angle? (Round your answer to two decimal places.)
A. 12.50 m/s
B. 0.40 m/s
C. 0.20 m/s
D. 0.80 m/s
Answer: B
Mathematics
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Find an equation of a parabola satisfying the given conditions.Find the equation of the parabola with vertex at the origin and axis along the x-axis if the parabola passes through the point 
A. x2 = 
y
B. y2 = 
x
C. x2 = 
y
D. y2 = 
x
Mathematics
Graph the horizontal or vertical line.y = 5
A. 
B. 
C. 
D. 
Mathematics
Write the mathematical expression as a phrase.9x + 5
A. 5 more than 9 times x B. the product of 9 and the sum of x and 5 C. 5 less than 9 times x D. 9 times the sum of x and 5
Mathematics
Perform the indicated operation.
A. 86 B. 85 C. 8.5 D. 74
Mathematics