Question

5x + 2y, when x = 5 and y = -2

Answer 1

21, you would substitute the x with the 5 and the y with the -2 which would look like

5 x 5 + 2 x -2

Answer 2

5x+2y

x=5

y=-2

then putting value of x and y in the equation

we get,

5*5+2*(-2)

=25-4

=21