wutdmgamerz
27.06.2019 •
Mathematics
Asystem of equations and its solution are given below. system a -x - 2y=7 5x - 6y=-3 solution (-3,-2) choose the correct option that explains what steps were followed to obtain the system of equations below. system b -x - 2y= 7 -16y=32 a. to get system b, the second equation in system a was replaced by the sum of that equation and the first equation multiplied by -5. the solution to system b will not be the same as the solution to system a. b. to get system b, the second equation in system a was replaced by the sum of that equation and the first equation multiplied by -6. the solution to system b will not be the same as the solution to system a. c. to get system b, the second equation in system a was replaced by the sum of that equation and the first equation multiplied by 3. the solution to system b will be the same as the solution to system a. d. to get system b, the second equation in system a was replaced by the sum of that equation and the first equation multiplied by 5. the solution to system b will be the same as the solution to system a.
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Ответ:
Option D
Step-by-step explanation:
we have
system A
-x-2y=7 > first equation A
5x-6y=-3 ---> second equation A
Multiply the first equation by 5 both sides
(5)*(-x-2y)=7*5 > -5x-10y=35
Adds
5x-6y=-3
-5x-10y=35
-6y-10y=-3+35
-16y=32
therefore
To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 5. The solution to system B will be the same as the solution to system A
Ответ:
D. To get system B, the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 5. The solution to system B will be the same as the solution to system A.
Step-by-step explanation:
I got it right in a test.
Ответ:
I say it would be 25%
Step-by-step explanation: