0,5√121+3√0,81

To simplify the expression 0.5√121 + 3√0.81, we will evaluate the square roots and perform the addition.

The square root of 121 is 11, since 11 x 11 = 121. The square root of 0.81 is 0.9, since 0.9 x 0.9 ≈ 0.81.

Now we substitute these values back into the expression:

0.5√121 + 3√0.81 = 0.5(11) + 3(0.9)

Multiplying, we get:

0.5(11) + 3(0.9) = 5.5 + 2.7

Finally, adding these numbers together:

5.5 + 2.7 = 8.2

Therefore, the simplified value of the expression is 8.2.