Given matrix A, find the indicated cofactor.Find A21.A = 
A. -5
B. 5
C. 7
D. -7
Answer: B
Mathematics
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Solve the problem.The range R of a projectile is related to the initial velocity v and projection angle ? by the equation 
where g is a constant. How is 
related to 
and 
if neither v nor ? is constant?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Use implicit differentiation to find dy/dx.xy + x = 2
A. 
B. - 
C. 
D. - 
Mathematics
Find the value of x.
?
Fill in the blank(s) with the appropriate word(s).
Mathematics
Evaluate the expression for the given replacement values.x - y
for x = 10, y = 16
A. -6 B. 26 C. -26 D. 6
Mathematics