Solve the differential equation.
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
C. Domain: all points in the xy-plane excluding x = 0; range: all real numbers; level curves: parabolas 
D. Domain: all points in the xy-plane excluding x = 0; range: real numbers z ? 0; level curves: parabolas 
Find the indicated sum.7 + 3 - 1 + . . . - 153
A. -146 B. -2920 C. -144 D. -2993
Compute the probability of an event for equally likely outcomes (theoretical probability).A freezer contains 6 cherry popsicles, 3 grape popsicles, and 1 orange popsicle. If a popsicle is chosen at random from the freezer, what is the probability that the popsicle is not grape?
A. 
B. 7
C. 
D. 
Pivot once about the circled element in the simplex tableau, and read the solution from the result.
A. x1 = 24, s2 = -16, z = 24; x2, x3, s1 = 0 B. x1 = 48, s2 = -16, z = -48; x2, x3, s1 = 0 C. x1 = 48, s2 = 16, z = 48; x2, x3, s1 = 0 D. x1 = 24, s2 = -16, z = -24; x2, x3, s2 = 0