Question

If x:y = 3:5, then find (2x + 3y), (5x +7y).

plz answer it fast ​

Answer 1

Answer:

Answer is 21, 50

Step-by-step explanation:

x:y = 3:5

∴, x=3 , y=5

=(2x+3y) , (5x +7y)

=(2×3+3×5) , (5×3 + 7×5)

=(6+15) , (15+35)

=21, 50

Hope it helps

Answer 2

Correct question :

If x:y = 3:5, then find (2x + 3y) : (5x +7y).

Solution :

Given, x : y = 3 : 5

We have to find (2x + 3y) : (5x + 7y)

From what's given,

→ x/y = 3/5

→ 5x = 3y

→ x = 3y/5

Now,

→ Required ratio = (2x + 3y) : (5x + 7y)

= (2 × 3y/5 + 3y) : (5 × 3y/5 + 7y)

= (6y/5 + 3y)/(3y + 7y)

= [(6y + 15y)/5]/10y

= (21y/5)/10y

= 21y/50y

= 21/50

= 21 : 50

Therefore,

(2x + 3y) : (5x + 7y) = 21 : 50.