21. If x: y = 3: 4, find (3x + 4y): (5x + 6y).

Juliushuck asked May 20, 2023

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Juliushuck asked May 20, 2023

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25 votes

Correct option is B)

Put x=3y=4

(3x+4y):(5x+6y)=(3×3+4×4):(5×3+6×4)

=(9+16):(15+24)

=25:39

JustinD answered May 23, 2023

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