Question

0,8(4a+3b)−6(0,1a+0,8b) при a=1,b=−4.

Answer 1

Ответ:

3,2а+2,4b-0,6a-4,8b=0

2,6a-2,4b=0

2,6×1-2,4(-4)=2,6+9,6=12,2

Объяснение:

Правильный ответ. Оцените если не сложно.

Answer 2

To evaluate the expression 0.8(4a + 3b) - 6(0.1a + 0.8b) with the values a = 1 and b = -4, we substitute these values into the expression and perform the calculations:

0.8(4(1) + 3(-4)) - 6(0.1(1) + 0.8(-4))

First, we simplify the inner parentheses:

0.8(4 - 12) - 6(0.1 - 3.2)

Next, we perform the multiplications inside the parentheses:

0.8(-8) - 6(-3.1)

Now, we multiply the values outside the parentheses:

-6.4 + 18.6

Finally, we add the two values:

12.2

Therefore, when a = 1 and b = -4, the expression 0.8(4a + 3b) - 6(0.1a + 0.8b) evaluates to 12.2.