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Lcorbett7414
28.06.2019 •
Mathematics
You are given the system of equations to solve by the elimination method, which is an incorrect step that will not produce a system with the same solution? x + 2y = 7 2x − 5y = 5 a) add 5 times the first equation and 2 times the second equation b) multiply the first equation by 2 and subtract the second equation c) multiply the first equation by −2 and add the second equation d) multiply x by 2 in the first equation and subtract the second equation
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Ответ:
D
Step-by-step explanation:
If you're doing to multiply a value by a number, ALL terms in the equation must be multiplied by the same value otherwise you do not have a correct equation.
Ответ:
D) multiply x by 2 in the first equation and subtract the second equation
Step-by-step explanation:
When you are trying to solve a system of equations you have to eliminate one of the terms so you´ll end up with only a one term equation that is solvave, in this case if you multiply X by 2 you can actually eliminate X from that equation, but by not multiplying all the terms on the equation you end up with a whole different equation and the result wont be accurate.
Ответ:
The most is Sandy
Step-by-step explanation:
we know that
When we compare fractions of the same numerator and different denominator, the fraction with the lowest denominator is greater
so
In this problem we have
Kim ate
of a bag
Sandy ate
of a bag
Jeff ate
of a bag
the lowest denominator is![\frac{3}{7}](/tpl/images/0255/1403/a7122.png)
therefore
The most is Sandy