Question

3 ( y - 2 ) + 2 ( y + 1) - 8 при y = 1/5

Answer 1

Ответ:

-0.4

Пошаговое объяснение:

$\frac{3}{5} - 6 + \frac{2}{5} + 2 - 8 \\ \frac{3}{5} - 6 + \frac{2}{5} - 6 \\ \frac{3}{5} + \frac{2}{5} - 12 = \frac{3}{5} + \frac{1}{5} - 6 \\ \frac{3}{5} + \frac{1}{5} - \frac{6}{5} = - \frac{ 2}{5} = - 0.4$

Answer 2

To evaluate the expression 3(y - 2) + 2(y + 1) - 8 when y = 1/5, we substitute the value of y into the expression and simplify it.

Let's substitute y = 1/5 into the expression:

3(1/5 - 2) + 2(1/5 + 1) - 8

First, simplify the inner parentheses:

3(1/5 - 2) + 2(6/5) - 8

Now, simplify the expressions inside the parentheses:

3(-9/5) + 2(6/5) - 8

Next, perform the multiplications:

-27/5 + 12/5 - 8

Now, combine the fractions with the same denominator:

(-27 + 12)/5 - 8

Simplify the numerator:

-15/5 - 8

Further simplify:

-3 - 8

Finally, perform the subtraction:

-11

Therefore, when y = 1/5, the expression 3(y - 2) + 2(y + 1) - 8 evaluates to -11.