Question

2,5а-7,5а+1, если а=0,1​

Answer 1

2,5а-7,5а+1=-5а+1
При а=0,1 -5•(0,1)+1=-0,5+1=0,5

Answer 2

To evaluate the expression 2.5a - 7.5a + 1 when a = 0.1, we substitute the value of a into the expression and perform the calculations.

Let's substitute a = 0.1:

2.5(0.1) - 7.5(0.1) + 1

Simplifying the multiplication:

0.25 - 0.75 + 1

Now performing the addition and subtraction:

= -0.5 + 1

= 0.5

Therefore, when a = 0.1, the expression 2.5a - 7.5a + 1 evaluates to 0.5.