Use a graphing calculator to find the matrix product and/or sum.Find A + B.A = 
B = 
A. 
B. 
C. 
D. 
Answer: D
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Solve the system by substitution. x + 6y = 182x + 6y = 12
A. ? B. {(-5, 3)} C. {(-6, 4)} D. {(-5, -6)}
Rewrite using exponential notation. Assume that even roots are of nonnegative quantities and that all denominators are nonzero.
A. 41/17
B. 
C. 171/4
D. -171/4
Use a product-to-sum identity to rewrite the expression.cos 1° sin 36°
A. 0.5(cos 37° + cos(-35°)) B. 0.5(sin 37° + sin(-35°)) C. 0.5(sin 37° + sin 35°) D. 0.5(cos(-35°) - cos 37°)
Find the center, foci, and vertices of the ellipse.25x2 + 16y2 = 400
A. center at (0, 0) foci at (- 3, 0) and (3, 0) vertices at (-5, 0), (5, 0) B. center at (0, 0) foci at (0, - 3) and (0, 3) vertices at (0, -5), (0, 5) C. center at (0, 0) foci at (0, 5) and (4, 0) vertices at (0, 25) and (16, 0) D. center at (0, 0) foci at (0, -5) and (0, 5) vertices at (0, -25), (0, 25)