2
7
) Write down a rational number which lies between
and
3
11​

43/66

Step-by-step explanation:

Let's write both fractions with the same denominator.  The LCD of 3 and 11 is 33.

2/3 = (2 * 11)/(3 * 11) = 22/33

7/11 = (7 * 3)/(11 * 3) = 21/33

The fractions 2/3 and 7/11 are equal to the fractions 22/33 and 21/33, respectively.

We need a fraction whose value is between 22/33 and 21/33.

We need a numerator between 21 and 22. Let's use 21.5 as the numerator.

The fraction 21.5/33 is between 2/3 and 7/11. In order not to have a decimal number as the numerator, we multiply the numerator and denominator of 21.5/33 by 2.

21.5/33 = 43/66

43/66

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180