3xy-5y for x=-1.5 and y=-3

Given the expression:

3xy-5y

to evaluate for x=-1.5 and y=-3, we shall proceed as follows:

plugging in the values in the expression:

3 * (-1.5) * (-3) - 5 * (-3)

simplifying the above we obtain:

13.5+15

=28.5

Answer:

28.5