Question

if a:b ::3:7,then what is (5a+6b):(a-2b)

Answer 1

Answer:

a:

Step-by-step explanation:

a:b :: 3:7

= a/b = 3/7

(5a+6b) : (a-2b)

= (5a+6b)/b : (a-2b)/b. (devide both by b)

= 5a/b + 6 : a/b - 2

= (5×3/7 + 6) : (3/7 - 2). put the value a/b

= (15+42)/7 : -11/7

= 57 : -11

Answer 2

Answer:

-57/11

Step-by-step explanation:

a/b = 3/7

a = 3b/7

(5a+6b)/(a-2b) = (15b/7 + 6b) / ( 3b/7 - 2b) = [(15b+42b)/7]/ h [(3b-14b)/7]

= 57b/(-11b) = -57/11

Hope that I am correct.