Question

-5(0,6c-1,2)-1,5c-3 при c=- 4_9

Answer 1

-3с+2,5-1,5с-3= -4,5с-0,5
-4,5*4,9-0,5=21,55

Answer 2

21,55 !!!!легко изменить

Answer 3

To evaluate the expression for the given value of c, substitute c with -4.9 and then perform the calculations step by step:

Given expression: -5(0.6c - 1.2) - 1.5c - 3

Step 1: Substitute c with -4.9: -5(0.6 * (-4.9) - 1.2) - 1.5 * (-4.9) - 3

Step 2: Calculate the expression within parentheses: -5(-2.94 - 1.2) - (-7.35) - 3

Step 3: Continue the calculations: -5(-4.14) + 7.35 - 3

Step 4: Complete the calculations: 20.7 + 7.35 - 3

Step 5: Final result: 25.05

Therefore, when c = -4.9, the expression evaluates to 25.05.