Question

Найдите значение -8x-7y при x=-2,9, y=13,9

Answer 1

-8 • (-2,9) - 7• 13,9= 23,2 - 97,3 = -74,1

Answer 2

-8*(-2,9)-7*13,9 = 23,2-97,3 = -74,1

Ответ : -74,1

Answer 3

To find the value of -8x - 7y when x = -2.9 and y = 13.9, simply substitute these values into the expression:

-8x - 7y = -8(-2.9) - 7(13.9)

Now, calculate the result:

-8(-2.9) = 23.2 -7(13.9) = -97.3

So,

-8x - 7y = 23.2 - 97.3 = -74.1

Therefore, the value of -8x - 7y when x = -2.9 and y = 13.9 is -74.1.