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 changing the black to dark grey and the light grey to white. Use matrix addition to accomplish this.
A. 
+ 
= 
B. 
+ 
= 
C. 
+ 
= 
D. 
+ 
= 
Answer: B
Mathematics
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Find the reciprocal, if it exists.- 
A. - 
B. 
C. 
D. 1
Mathematics
Perform the operation indicated. Simplify.
- 
A. 
B. 
C. 
D. 
Mathematics
Evaluate the following.cos-1 1.4 (Approximate to a tenth of a degree.)
A. Undefined B. 0° C. 0.2° D. 1.0°
Mathematics
Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. open infinite interval; {x|x < -9}; (-?, -9) B. closed infinite interval; {x|x ? -9}; (-?, -9] C. closed infinite interval; {x|x ? -9}; [-9, ?) D. open infinite interval; {x|x > -9}; (-9, ?)
Mathematics