Question

16. 1) 9-7y - 2,5 - 3y; 3) 0,8x - 3,5--1,2x+0,5; 2) 3,2-5a --1,8a + 4; 4) 8,6x3,7 7,6x - 5. НЕ ПЕРЕВОДЯ В ДРОБИ И ПЖ ПО БЫССТРЕЙ СРОЧНО НУЖНО​

Answer 1

Ответ:

1)9-7у-2,5-3у=6,5-10у

2)3,2-5a-1,8a + 4=7,2-6,8а

3)0,8x - 3,5-1,2x+0,5=-3-0,4х

4) не поняла//

Пошаговое объяснение:

1)9-7у-2,5-3у=6,5-10у

-7у-3у=-10у

9-2,5=6,5

2)3,2-5a-1,8a + 4=7,2-6,8а

-5а-1,8а=-6,8а

3,2+4=7,2

3)0,8x - 3,5-1,2x+0,5=-3-0,4х

0,8х-1,2х=-0,4х

-3,5+0,5=-3

Answer 2

1. To simplify the expression 9-7y - 2.5 - 3y, we can combine like terms. The terms with "y" can be combined, as well as the constant terms:

9 - 7y - 2.5 - 3y

Combine the "y" terms: -7y - 3y = -10y

Combine the constant terms: 9 - 2.5 = 6.5

So the simplified expression is 6.5 - 10y.

2. To simplify the expression 3.2 - 5a - -1.8a + 4, we can simplify the subtraction of negative terms and combine like terms:

3.2 - 5a + 1.8a + 4

Combine the "a" terms: -5a + 1.8a = -3.2a

Combine the constant terms: 3.2 + 4 = 7.2

So the simplified expression is 7.2 - 3.2a.

3. To simplify the expression 0.8x - 3.5 - -1.2x + 0.5, we can simplify the subtraction of negative terms and combine like terms:

0.8x - 3.5 + 1.2x + 0.5

Combine the "x" terms: 0.8x + 1.2x = 2x

Combine the constant terms: -3.5 + 0.5 = -3

So the simplified expression is 2x - 3.

4. To simplify the expression 8.6x3.7 - 7.6x - 5, we can perform the multiplication and combine like terms:

(8.6 * 3.7)x - 7.6x - 5

Perform the multiplication: (8.6 * 3.7) ≈ 31.82

Combine the "x" terms: 31.82x - 7.6x = 24.22x

Combine the constant terms: -5

So the simplified expression is 24.22x - 5.

Please note that it's important to use proper mathematical notation and formatting to avoid confusion in mathematical expressions.