I would like to kow how to evaluate xy when x=3 and y=-7?

Question

I would like to kow how to evaluate xy when x=3 and y=-7?

Answer 1

-21??

x times y

3 times -7 = -21

Answer 2

3*-7= -21

Answer 3

simple. just substitute.

xy = 3(-7) = -21

Answer 4

Just substitute the values in

3*-7 = -21

Good luck to you !

Answer 5

   -  21

Answer 6

x * y becomes (3) * (-7) = -21      where * is the multiplication symbol

Final answer:    -21   <<<<<

Answer 7

When two variables are given, and you want to find the product, you are supposed to simply multiply them. So here, when x=3 & y=-7, your answer (i.e 'xy') will be x multiplied by y.

That is,

       x y = 3 x (-7)

             = -21

Therefore, your answer will be -21.

^_^  

Answer 8

Then,xy=(3)X(-7)= - 21

Answer 9

xy means multiply x and y...

(3)(-7) = -21

Answer 10

it's very easy. when two variables are next to each other, you multiply them. so if x=3 and y=-7, xy = x *(multiplied by) y = 3*-7 = -21

Answer 11

xy when x=3 y=-7

xy=  (3)(-7)= -21

Answer 12

xy = -3 * 7 = -21

Answer 13

multiply them together, xy=(-7)(3)= -21