Question

3x-7 2x + 5 если х=-1; 2; –0,2; 0; 2,1.​

Answer 1

відповідь:3x7 2x+5если x=-1x-3 5x + 7=4x5

Пояснення:

Answer 2

Ответ:

Ответ ниже

Объяснение:

x=-1  -  3*-1-7*2*-1+5 = 3*(-1)-7*2*(-1)+5 = 2-7*1+5 = 2-7+5 = -5+5 = 0.

x=2  -  3*2-7*2*2+5 = 6-7*4+5 = 6-(-28)+5 = -34+5 = -29

x=0  -  3*0-7*2*0+5 = 0-7*0+5 = 0-0+5 = 5

Answer 3

To evaluate the expression 3x - 7 for different values of x, let's substitute each given value of x into the expression:

For x = -1: 3(-1) - 7 = -3 - 7 = -10

For x = 2: 3(2) - 7 = 6 - 7 = -1

For x = -0.2: 3(-0.2) - 7 = -0.6 - 7 = -7.6

For x = 0: 3(0) - 7 = 0 - 7 = -7

For x = 2.1: 3(2.1) - 7 = 6.3 - 7 = -0.7

Therefore, the values of the expression 3x - 7 for x = -1, 2, -0.2, 0, and 2.1 are -10, -1, -7.6, -7, and -0.7, respectively.