Question

2х+7у,при х=-1,4, у=2,1

Answer 1

Ответ:

2х+7у =11,9

Объяснение:

2х+7у= 2*(-1,4) + 7*2,1= -2,8+14,7 = 11,9

Answer 2

To evaluate the expression 2x + 7y when x takes the values -1 and 4, and y takes the values 2 and 1, we substitute these values into the expression.

For the first set of values (x = -1, y = 2):

2x + 7y = 2(-1) + 7(2) = -2 + 14 = 12

For the second set of values (x = 4, y = 1):

2x + 7y = 2(4) + 7(1) = 8 + 7 = 15

Therefore, when x = -1 and y = 2, the expression 2x + 7y equals 12, and when x = 4 and y = 1, the expression equals 15.