Question

(5с- 6в)- ( 3с -5в )= при с=-0.25 в=2.5

Answer 1

=5с-6в-3с+5в=2с-в 2*(-0,25)-2,5=-0,5-2,5=-3

Answer 2

To find the value of the expression (5c - 6в) - (3c - 5в) when c = -0.25 and в = 2.5, we simply substitute these values into the expression and perform the calculations.

Let's calculate step-by-step:

1. Substitute c = -0.25 and в = 2.5 into the expression: (5*(-0.25) - 62.5) - (3(-0.25) - 5*2.5)

2. Perform the arithmetic operations within each set of parentheses: (-1.25 - 15) - (-0.75 - 12.5)

3. Continue with the subtraction inside the parentheses: -16.25 - (-13.25)

4. When subtracting a negative number, it's the same as adding its positive counterpart: -16.25 + 13.25

5. Finally, perform the addition: = -3

So, when c = -0.25 and в = 2.5, the expression (5c - 6в) - (3c - 5в) evaluates to -3.