Question

5х-(2×y+0,5y)(-2y) при ×=-1,4 y=-5/2​

Answer 1

Ответ:

-39/2

Объяснение:

Получилось выражение :

5х+5у²

Подставляем

5*(-1,4)+5*(-5/2)

Равно: - 39/2 или - 19,5

Answer 2

To evaluate the expression 5x - (2y + 0.5y)(-2y) for the given values x = -1.4 and y = -5/2, follow these steps:

Step 1: Substitute the values of x and y into the expression. Step 2: Perform the arithmetic operations according to the order of operations (PEMDAS/BODMAS).

Given: x = -1.4 y = -5/2 = -2.5

Now, let's evaluate the expression step by step:

1. Substitute the values of x and y: 5x - (2y + 0.5y)(-2y)

Replace x with -1.4: 5(-1.4) - (2(-2.5) + 0.5(-2.5))(-2(-2.5))

2. Perform the arithmetic operations inside parentheses: 5(-1.4) - ((-5) + (-1.25))(-2(-2.5))

3. Continue simplifying: -7 - (-6.25)(5)

4. Perform the multiplication inside the second set of parentheses: -7 - (-31.25)

5. Now, perform the subtraction: -7 + 31.25

6. Final result: 31.25 - 7 = 24.25

So, the expression 5x - (2y + 0.5y)(-2y) when x = -1.4 and y = -5/2 evaluates to 24.25.