Question

Подобные слагаемые. Приведение подобных слагаемых. Урок 1Найди значение выражения1,2(3x+5y) - 2yпри 0,9х+ y = - 2,5.Ответ:Проверить​

Answer 1

Ответ:

-10

Пошаговое объяснение:

3,6х+6у-2у=3,6х+4у=4(0,9х+у)=4*(-2,5)=-10

Answer 2

Solving the Expression for Given Values

To find the value of the expression 1.2(3x + 5y) - 2y when x = 0.9 and y = -2.5, we can substitute these values into the expression and simplify it.

First, let's substitute the given values of x and y into the expression: 1.2(3*0.9 + 5*(-2.5)) - 2*(-2.5)

Now, let's calculate the expression step by step.

Calculation

1.2(3*0.9 + 5*(-2.5)) - 2*(-2.5) = 1.2(2.7 - 12.5) - (-5) = 1.2*(-9.8) + 5 = -11.76 + 5 = -6.76

Answer

The value of the expression 1.2(3x + 5y) - 2y when x = 0.9 and y = -2.5 is -6.76.