Tell which real number corresponds to the situation.A football team lost 20 yards on one play.
A. -20
B. 20
Answer: A
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Solve the problem.According to Einstein's famous Relativity Theory, the mass of an electron with velocity v is given by: m = 
,where mo is the rest mass of the electron and c is the speed of light in a vacuum. Solve the equation for v.
A. v = 
B. v = 
C. v = ±
D. v = 
Find the specified minor and cofactor for the matrix A.M21 and A21 if A = 
A. M21 = -27 and A21 = 77 B. M21 = -24 and A21 = 24 C. M21 = -24 and A21 = -24 D. M21 = -27 and A21 = -27
Round the number to the place indicated.Round to the nearest thousandth: 1.5742
A. 1.574 B. 1.575 C. 1.57 D. 1.56
Give all solutions of the nonlinear system of equations, including those with nonreal complex components. x2 - xy + y2 = 32x2 + xy + 2y2 = 12
A. {(2, 1), (1, 2)} B. {(1, 0), (-1, 0)} C. {(2, 1), (-2, -1), (1, 2), (-1, -2)} D. {(2, 0), (-2, 0), (1, 0), (-1, 0)}