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Alisiya [41]
4 years ago
9

7. Which method would be the most efficient to solve the system? y = 1/2x, 2x + 3y = 28

Mathematics
1 answer:
gavmur [86]4 years ago
7 0
Y = ¹/₂x
2x + 3y = 28

     2x + 3y = 28
2x + 3(¹/₂x) = 28
   2x + 1¹/₂x = 28
           <u>3¹/₂x</u> = <u>28</u>
            3¹/₂    3¹/₂
                 x = 8
y = ¹/₂x
y = ¹/₂(8)
y = 4
(x, y) = (8, 4)
The method would be a substitution method (the answer is B).
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