Question

-5(0,6c-1,2)-1,5c-3 при c=-4/9

Answer 1

-5(0,6c-1,2)-1,5c-3= -3c+ 6 -1,5c- 3= -4,5c+3
подставляем-4,5c+3= -4,5*(-4/9) +3= 2+3=5

Answer 2

To evaluate the expression -5(0.6c - 1.2) - 1.5c - 3 when c = -4/9, follow these steps:

Step 1: Replace c with -4/9 in the expression. Step 2: Perform the calculations.

Let's do it:

Step 1: Replace c with -4/9: -5(0.6(-4/9) - 1.2) - 1.5(-4/9) - 3

Step 2: Now, simplify the expression: -5(0.6 * (-4/9) - 1.2) - 1.5 * (-4/9) - 3 = -5(-2.4/9 - 1.2) + 6/9 - 3 = -5((-2.4 - 1.2) / 9) + 6/9 - 3 = -5(-3.6/9) + 6/9 - 3 = 5(3.6/9) + 6/9 - 3 = 5(0.4) + 2/3 - 3 = 2 - 3 + 2/3 = -1 + 2/3 = -1/3

So, when c = -4/9, the value of the expression is -1/3.