Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 10 miles per hour and the other at 13 miles per hour. In how many hours will they be 46 miles apart?
A. 4 hours
B. 1 hour
C. 3 hours
D. 2 hours
Answer: D
Mathematics
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Change the following percent to a decimal.10%
A. 1 B. 100 C. 10 D. 0.01 E. 0.1
Mathematics
Solve by completing the square.x2 + 14x + 13 = 0
A. -13, -1
B. ±
C. 1, 13
D. 26, -13
Mathematics
Decide what values of the variable cannot possibly be solutions for the equation.
- 
= 
A. -3, 0, 9 B. -9, 3 C. -3, 9, -27 D. -9, 0, 3
Mathematics
The ? shape in the figure below is shown using 9 pixels in a 3 × 3 grid. The color levels are given to the right of the figure. Use the matrix 
that represents a digital photograph of the ? shape to solve the problem.
Adjust the contrast by leaving the black alone and changing the light grey to dark grey. Use matrix addition to accomplish this.
A. 
+ 
= 
B. 
+ 
= 
C. 
+ 
= 
D. 
+ 
= 
Mathematics