Question

|4-5x|-3*|x|= Если x=1,7 ----------------- 7|-x|-4|3y-3,4| Если x=-2 y=0,2

Answer 1

/4-8,5\-3*1,7=4,5-5,1=0,6

7*2-4*/0,6-3,4\=14-4*2,8=14-11,2=2,8

Answer 2

|4-5*1,7|-3*|1,7|=|4-8,5|-3*1,7=|-4,5|-5,1=4,5-5,1=-0,6

7|-(-2)|-4|3*0,2-3,4|=7*2-4|0,6-3,4|=14-11,2=2,8

Answer 3

To find the values of the given expressions when specific values of x and y are substituted, we simply replace x and y in the expressions and perform the calculations. Let's start with the first expression:

1. |4 - 5x| - 3 * |x|, when x = 1.7

Substitute x = 1.7 into the expression:

|4 - 5(1.7)| - 3 * |1.7|

Now, perform the calculations:

|4 - 8.5| - 3 * 1.7

| -4.5 | - 5.1

Since the absolute value of -4.5 is 4.5, we get:

4.5 - 5.1 = -0.6

So, the value of the expression when x = 1.7 is -0.6.

2. 7|-x| - 4|3y - 3.4|, when x = -2 and y = 0.2

Substitute x = -2 and y = 0.2 into the expression:

7|-(-2)| - 4|3(0.2) - 3.4|

Now, perform the calculations:

7 * 2 - 4 * |0.6 - 3.4|

7 * 2 - 4 * |-2.8|

7 * 2 - 4 * 2.8

14 - 11.2 = 2.8

So, the value of the expression when x = -2 and y = 0.2 is 2.8.