Question

2,1a-2,1b-7(b-a) a=10,3 b=5,3​

Answer 1

Ответ:

45,5

Объяснение:

2,1•10,3-2,1•5,3-7•(5,3-10,3) =

21,63-11,13+35=10,5+35=45,5

Answer 2

Сначала упрощаем, получаем 9,1а-9,1b, подставляем дроби и получаем: (9,1*10,3)-(9,1*5,3)=9,1(10,3-5,3)=9,1*5=45,5

Answer 3

It looks like you have an expression with variables a and b, and you want to evaluate it with specific values for a and b. Let's substitute the values and calculate the result:

Given expression: 2.1a - 2.1b - 7(b - a)

a = 10.3 b = 5.3

Now, plug in these values into the expression:

2.1 * 10.3 - 2.1 * 5.3 - 7(5.3 - 10.3)

Now, calculate each part step by step:

1. 2.1 * 10.3 = 21.63
2. 2.1 * 5.3 = 11.13
3. 5.3 - 10.3 = -5.0
4. 7 * (-5.0) = -35.0

Now, substitute these values back into the expression:

21.63 - 11.13 - (-35.0)

Now, simplify further:

21.63 - 11.13 + 35.0

Now, add the numbers:

21.63 - 11.13 + 35.0 = 45.5

So, the result of the expression 2.1a - 2.1b - 7(b - a) with a = 10.3 and b = 5.3 is 45.5.