Question

2a+3b:3b если a:b=0,9

Answer 1

= 2a/3b + 3b/3b = 2/3*a/b + 1 = 2/3*0,9 + 1 = 0,6 + 1 = 1,6

Answer 2

To simplify the expression 2a + 3b : 3b, we need to substitute the given ratio of a:b.

Given: a:b = 0.9

To get the values of a and b, we can assume a constant value for b. Let's take b = 10 (you can choose any value, but for simplicity, we'll use b = 10).

a:b = 0.9, so a = 0.9 * b a = 0.9 * 10 a = 9

Now we have a and b: a = 9 b = 10

Next, we can simplify the expression:

2a + 3b : 3b

Substitute the values:

2(9) + 3(10) : 3(10)

Now perform the operations:

18 + 30 : 30

Addition first:

18 + 30 = 48

Then divide:

48 : 30 = 1.6

So, 2a + 3b : 3b, when a:b = 0.9 (or a = 9, b = 10), is equal to 1.6.