Use the graph to estimate all solutions to the system of equations.y2 - x2 = 16x2 + 5y2 = 80
A. (0, -4), (-4, 0)
B. (0, 0)
C. (0, -4), (0, 4)
D. (0, -4), (0, 0), (0, 4)
Answer: C
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Solve the problem.Find a field G = P(x, y)i + Q(x, y)j in the xy-plane with the property that at any point (a, b) ? (0, 0), G is a vector of magnitude 
tangent to the circle x2 + y2 = a2 + b2 and pointing in the clockwise direction.
A. xi + yj B. xi - yj C. -yi + xj D. yi - xj
Solve the differential equation.
= 4x3e-y
A. y = x4 + C B. y = ln (x4 + C) C. y = ln (4x4 + C) D. y = C ln (x4)
Decide whether the given set of numbers is a group under the given operation.Prime numbers; multiplication
A. Yes B. No
Use unit ratios or conversion factors to change to the units indicated. Round to the nearest tenth, if necessary.6.3 yd to meters
A. 5.7 m B. 248.0 m C. 160.0 m D. 48.0 m