Given matrix A, find the indicated cofactor.Find A12.A = 
A. 3
B. 21
C. 20
D. -3
Answer: A
Mathematics
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Simplify.
A. 5
B. 3
C. 3
D. 5
Mathematics
Use the given trigonometric function value of ? to find the requested trigonometric function value of the acute angle ?. Rationalize the denominators where necessary.sec ? = 5 
Find cos ?.
A. - 
B. 
C. - 
D. 
Mathematics
The lengths of the sides of a triangle are given. Determine if the triangle is a right triangle. If it is, identify the hypotenuse.10, 24, 26
A. right triangle; 24 B. right triangle; 26 C. right triangle; 10 D. not a right triangle
Mathematics
Rationalize the denominator and simplify.
A. 
B. 
C. 
D. 11
Mathematics