Question

7x-4y+5x-6y+9y,где x=1 1/12,y=-1,8​ упростить выражение и найти числовое значение

Answer 1

Ответ:

12,8

Пошаговое объяснение:

7х-4у+5х-6у+9у = 12х-у = (12*11)/12 +1,8 = 11 + 1,8 = 12,8

Answer 2

Ответ:

12x-1y=11+1.8=12.8

Пошаговое объяснение:

Answer 3

To simplify the expression 7x - 4y + 5x - 6y + 9y, we'll first substitute the given values for x and y and then perform the arithmetic operations.

Given: x = 1 1/12 and y = -1.8

Step 1: Substitute the values of x and y into the expression: 7(1 1/12) - 4(-1.8) + 5(1 1/12) - 6(-1.8) + 9(-1.8)

Step 2: Simplify the expression using the arithmetic rules: To add or subtract fractions, they must have the same denominator.

Convert 1 1/12 to an improper fraction: 1 1/12 = 13/12

So, the expression becomes: 7 * (13/12) - 4 * (-1.8) + 5 * (13/12) - 6 * (-1.8) + 9 * (-1.8)

Step 3: Perform the arithmetic operations: 7 * (13/12) = 91/12 5 * (13/12) = 65/12 -6 * (-1.8) = 10.8 9 * (-1.8) = -16.2

Now, the expression becomes: (91/12) - 4 * (-1.8) + (65/12) - 10.8 - 16.2

Step 4: Continue simplifying: (91/12) + 28.8 + (65/12) - 10.8 - 16.2

Step 5: Combine the fractions: (91/12) + (65/12) = (91 + 65) / 12 = 156/12 = 13

Now, the expression becomes: 13 + 28.8 - 10.8 - 16.2

Step 6: Perform the final arithmetic operation: 13 + 28.8 - 10.8 - 16.2 = 15.8

The simplified expression is 15.8, which is the numerical value of the given expression when x = 1 1/12 and y = -1.8.