Given matrix A, find the indicated minor or cofactor.Find the cofactor A21.A = 
A. 15
B. -15
C. -3
D. 3
Answer: D
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Find a linear equation whose graph passes through the given points. Write the equation in slope-intercept form.(-4, 7) and (1, -7)
A. y = - 
x - 
B. y = 
x - 
C. y = - 
x - 
D. y = 
x - 
Solve the problem.Zach is planning to invest up to $50,000 in corporate and municipal bonds. The least he will invest in corporate bonds is $9000 and he does not want to invest more than $27,000 in corporate bonds. He also does not want to invest more than $34,307 in municipal bonds. The interest is 8.2% on corporate bonds and 6.2% on municipal bonds. This is simple interest for one year. What is the maximum income?
A. $3640 B. $4788 C. $30,640 D. $26,640
Add, subtract, or multiply, as indicated. Express your answer as a single polynomial in standard form.(-7x2 + 7) - (-x3 + 4x2 + 4)
A. x3 - 11x2 + 3 B. -6x3 + 11x2 - 4 C. -6x3 + 4x2 + 3 D. x3 - 3x2 + 11
Find the square root.
A. 0.06 B. 0.006 C. 6 D. 0.6