The currents in an electrical network are given by the solutions of the system
where I1, I2, and I3 are measured in amperes. Solve the system of equations using matrices.
A. no solution
B. I1 = 3, I2 = 3, I3 = 7
C. I1 = 5, I2 = 4, I3 = 9
D. I1 = 3, I2 = 3, I3 = 6
E. I1 = 5, I2 = 9, I3 = 4
Answer: C
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Find the quadratic approximation of f at x = 0.f(x) = tan 2x
A. Q(x) = 1 - 1x2 B. Q(x) = 1 + 1x2 C. Q(x) = 2x D. Q(x) = 1 + 2x2
Provide an appropriate response.What does it mean for an observed difference to be statistically significant at the 0.01 level?
A. The probability of the observed difference occurring by chance is 1 in 100 or more. B. The probability of the observed difference occurring if the alternative hypothesis is true is 1 in 100 or more. C. The probability of the observed difference occurring if the alternative hypothesis is true is 1 in 100 or less. D. The probability of the observed difference occurring by chance is 1 in 100 or less.
Solve the problem.A country consists of six states, with the state's populations given in the following table. The number of seats to be apportioned is M = 100. Find the apportionment under the Huntington-Hill method. 
A. A:32; B:21; C:19; D:13; E: 5; F: 10 B. A:32; B:21; C:20; D:12; E: 5; F: 10 C. A:32; B:22; C:18; D:13; E: 5; F: 10 D. A:32; B:21; C:19; D:13; E: 6; F: 9 E. A:33; B:21; C:19; D:13; E: 5; F: 9
Write the complex number in the form a + bi.4(cos -135° + i sin -135°)
A. -2
- 2
i
B. - 
- 
i
C. - 
+ 
i
D. -2
+ 2
i