Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the initial value problem.v'(t) + 
= 6, v(-1) = 0
A. v = -12(et/2 + 1/2 + 12) B. v = -12e-t/2 - 1/2 + e1/2 C. v = -12(e-t/2 - 1/2 - 1) D. v = 3e-t/2 - 1/2 + 3
Mathematics
Determine where the given function is concave up and where it is concave down. f(x) = 7x - x3
A. Concave up on (0, ?), concave down on (-?, 0) B. Concave down for all t C. Concave up on (-?, 0), concave down on (0, ?) D. Concave up on (-?, 0) and (1, ?), concave down on (0, 1)
Mathematics
Use Cramer's rule to solve the system.2.5x + 2.2y = 40.11.0x - 2.3y = -9.4
A. {(9, 8)} B. {(-9, -8)} C. {(-8, 9)} D. {(8, 9)}
Mathematics
Find the equation of the line passing through the two points.(7, -3) and (-5, 4)
A. y = 
x - 
B. y = - 
x - 
C. y = - 
x + 
D. y = 
x + 
Mathematics