Mathematics, 18.12.2020 14:00 seanisom7
1.Refer to the system of linear equations shown below. Which of the following statements gives the best choice for multiplying to solve this system using the elimination method?
3xβ6y=4
6x+11y=β2
(1 point)
Multiply the second equation by 12, so the x-variables are eliminated.
Multiply the first equation by 2, so the x-variables are eliminated.
Multiply the first equation by β11 and the second equation by 6, so the y-variables are eliminated.
Multiply the first equation by β2, so the x-variables are eliminated.
2.Given the following system, what should the second equation be multiplied by so that x is eliminated?
4xβy=9
x+3y=12
(1 point)
13
β4
β13
4
3.Solve the following system by the elimination method.
4xβ2y=16
3x+6y=β18
(1 point)
(1, β5)
(3, β2)
(2, β4)
(0, β3)
4.Solve the system by the elimination method.
3xβ5y=4
β9x+3y=β24
(1 point)
(8, 4)
(1, β1)
(3, 1)
(2, β2)
5.Manny says he should multiply the first equation in the system of equations below by 3 and the second equation by 2, then add to eliminate x. Is there a more efficient way to solve this system? Explain your answer.
β2x+y=15
3x+4y=β12
(1 point)
No, there isn't a more efficient way to solve this system.
Yes, a more efficient way is to multiply the first equation by 4, add to eliminate y, then solve for x.
Yes, a more efficient way is to multiply the first equation by β4, add to eliminate y, then solve for x.
Yes, a more efficient way is to multiply the first equation by β4, add to eliminate x, then solve for y.
Answers: 1
Mathematics, 22.06.2019 01:30
You have 37 coins that are nickels, dimes, and pennies. the total value of the coins is $1.55. there are twice as many pennies as dimes. find the number of each type of coin in the bank.
Answers: 1
Mathematics, 22.06.2019 04:30
Consider the linear model for a two-stage nested design with b nested in a as given below. yijk=\small \mu + \small \taui + \small \betaj(i) + \small \varepsilon(ij)k , for i=1,; j= ; k=1, assumption: \small \varepsilon(ij)k ~ iid n (0, \small \sigma2) ; \small \taui ~ iid n(0, \small \sigmat2 ); \tiny \sum_{j=1}^{b} \small \betaj(i) =0; \small \varepsilon(ij)k and \small \taui are independent. using only the given information, derive the least square estimator of \small \betaj(i) using the appropriate constraints (sum to zero constraints) and derive e(msb(a) ).
Answers: 2
1.Refer to the system of linear equations shown below. Which of the following statements gives the b...
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