Question

6 5/9(x-9)+2 2/9(18-x)Если х = 0,3​

Answer 1

Ответ: 6 5/9*(-8,7)+2 2/9*17,7=59*(-8,7)/9+20*17,7/9=354/9-513,3/9=

-159,3/9=-1593/90=-17,7.

Пошаговое объяснение:

Answer 2

To evaluate the expression when x = 0.3, simply substitute the value of x into the expression and perform the calculations step by step:

Expression: 6 5/9(x-9) + 2 2/9(18-x)

Let's replace x with 0.3:

6 5/9(0.3 - 9) + 2 2/9(18 - 0.3)

Now, let's perform the calculations inside the parentheses:

6 5/9(-8.7) + 2 2/9(17.7)

Next, let's perform the multiplications:

-52 + 2 2/9(17.7)

Now, calculate the fraction 2 2/9 as an improper fraction:

2 2/9 = 20/9

Now, replace the fraction in the expression:

-52 + 20/9(17.7)

Now, calculate the multiplication of 20/9 with 17.7:

-52 + 20/9 * 17.7

To multiply a fraction with a decimal number, you can convert the decimal number to a fraction and then perform the multiplication. In this case, 17.7 can be represented as 177/10:

-52 + 20/9 * (177/10)

To multiply fractions, you multiply the numerators together and the denominators together:

-52 + (20 * 177) / (9 * 10)

Now, perform the multiplication:

-52 + 3540 / 90

Now, reduce the fraction:

-52 + 39 1/3

To add a whole number and a fraction, convert the whole number to a fraction with the same denominator as the fraction:

-52 + 39 1/3 = -52 + (39 * 3 + 1) / 3 = -52 + 118/3

Now, find a common denominator (3) and perform the addition:

-52 + 118/3 = (-52 * 3) / 3 + 118/3 = -156/3 + 118/3 = -38/3

So, the final result when x = 0.3 is:

-38/3 or approximately -12.67.