Question

Дана линейная функция 1)y=-3,9x 2)y=-0,45x-|-3,45|найдите х если1)y=12)y=-13)y=-2/34)y=5

Answer 1

Если y=1, то 1)1=-3,9х
                        3,9х=-1
                        х=- (10/39)
                      2)1=-045х-(-3,45)
                         0,45х=3,45-1
                        0,45х=2,45
                               х=5 4/9
Если у=-1, то   1)х=(10/39)
                          2)0,45х=3,45+1
                              х=8 (8/9)
Если y=-2/3, to 1)-2/3=-3.9x
                            3.9x=2/3
                            x=20/87
                           2)-2/3=-045х-(-3,45)
                               0.45x=3.45+2/3
                                0.45x=4 7/60
                              x=3 2/3
Если у=5, то 1)5=-3,9x
                         3.9x=-5
                        x=  1 11/39
                      2)5 =-045х-(-3,45)
                         0.45x=3.45-5
                         0.45x=-1.55
                         x=-3 4/9

Answer 2

To find the value of x for each of the given linear functions, you simply need to substitute the given y-values into the respective equations and solve for x. Let's go through each case:

1. For the function y = -3.9x: Let y = 1: 1 = -3.9x Now, isolate x: x = 1 / -3.9 x ≈ -0.2564

2. For the function y = -0.45x - |-3.45|: Let y = 1: 1 = -0.45x - |-3.45| To remove the absolute value, we need to consider two cases: a) -3.45 ≥ 0: 1 = -0.45x - (-3.45) 1 = -0.45x + 3.45 Now, isolate x: -0.45x = 1 - 3.45 -0.45x = -2.45 x ≈ 5.4444

b) -3.45 < 0: 1 = -0.45x - (3.45) 1 = -0.45x - 3.45 Now, isolate x: -0.45x = 1 + 3.45 -0.45x = 4.45 x ≈ -9.8889

So, for this case, we have two possible solutions for x: x ≈ 5.4444 and x ≈ -9.8889.

Now, let's find x for the other y-values:

3. For the function y = -2/3x: Let y = 1: 1 = -2/3x Now, isolate x: x = 1 / (-2/3) x = -3/2 x = -1.5

4. For the function y = 5: This is a horizontal line, and it doesn't depend on x. The value of y is 5 for all x. Therefore, there is no unique value of x associated with y = 5.

So, the solutions for x are as follows:

1. x ≈ -0.2564
2. Two possible solutions: x ≈ 5.4444 or x ≈ -9.8889
3. x = -1.5
4. No unique value of x for y = 5.