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23-04-2020
Mathematics

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3a + b = 7
and
6x + 8y = 40
Show that 9a + 3b has a greater value than 3x + 4y
ANYONE HELP PLS

3a b 7 and 6x 8y 40 Show that 9a 3b has a greater value than 3x 4y ANYONE HELP PLS class=

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A113Pixar A113Pixar

23-04-2020

Answer:

3a + b = 7

6x + 8y = 40

9a + 3b is 3*(3a + b) or 7*3 = 21

3x + 4y is (6x + 8y) /3 = 40 / 3 ≅ 13.3

So now we know that 9a + 3b = 21 and 3x + 4y = 13.3 which means that it is greater because 21 > 13.3

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