Question

3a-2b якщо а=1/9, b=1/8

Answer 1

3*1/9-2*1/8=1/3-1/4=(1*4-1*3)/12=1/12.

Ответ: 1/12.

Answer 2

To evaluate the expression 3a - 2b when a = 1/9 and b = 1/8, simply substitute the values of a and b into the expression:

3a - 2b = 3 * (1/9) - 2 * (1/8)

Now, let's calculate the result step by step:

3 * (1/9) = 3/9 = 1/3

2 * (1/8) = 2/8 = 1/4

So, the expression becomes:

3a - 2b = 1/3 - 1/4

To combine these fractions, we need to find a common denominator, which is 12:

(1/3) * (4/4) = 4/12 (1/4) * (3/3) = 3/12

Now, the expression becomes:

3a - 2b = 4/12 - 3/12

Subtract the fractions:

3a - 2b = (4 - 3) / 12 3a - 2b = 1/12

So, when a = 1/9 and b = 1/8, the value of 3a - 2b is 1/12.