Question

1)-0,8a*0,25b*(-c) 2)-(3a-5)+5a-6) 3)(5x-7)-(3x+8)

Answer 1

0,2абс

2)-(3a-5+5a-6)  = -(8а-11) = 8а+11

3) 5х-7-3х-8=2х-15

Answer 2

Let's simplify the given expressions:

1. -0.8a * 0.25b * (-c)

To simplify this expression, we can start by multiplying the numbers:

-0.8 * 0.25 = -0.2

Now we can rewrite the expression as:

-0.2ab*(-c)

2. -(3a - 5) + 5a - 6

To simplify this expression, we can remove the parentheses and combine like terms:

-3a + 5 + 5a - 6

Combining like terms, we get:

2a - 1

3. (5x - 7) - (3x + 8)

To simplify this expression, we can remove the parentheses and combine like terms:

5x - 7 - 3x - 8

Combining like terms, we get:

2x - 15

So the simplified expressions are:

1. -0.2ab*(-c)
2. 2a - 1
3. 2x - 15