Question

EXERCIS
1. If x: y = 3:5, find the ratio 3x + 4y: 8x +5y.
- If x: y = 8:9, find the ratio (7x - 4y): 3x + 2y.
plz help me
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Answer 1

Step-by-step explanation:

Let X be 3a and y be 5a

=3(3a)+4(5a):8(3a)+5(5a)

=9a+20a:24a+25a

=29a:49a

=29:49

Answer 2

Answer:

Step-by-step explanation:

Let x be 8k

& y be 9k

NOW,

(7x-4y)=(7×8k-4×9k)

=(56k-36k)

=20k

(3x+2y)=(3×8k-2×9k)

=(24k-18k)

=6k

NOW,

(7x-4y):(3x+2y)

=20k:6k

=10:3