4xy+2k for x=3,y=-4 and k=5
so, just plug in the numbers
4(3)(-4) + 2(5) = ?
4 * 3 * -4 + 2 * 5 = -38
4xy+2k
Substitute the numbers for the letters
(4 * 3 * -4) + (2 * 5)
-48 + 10 = -38
To evaluate the expression 4xy + 2k for x=3, y=-4, and k=5, you can substitute these values into the expression and perform the calculations step by step.
Given:
x = 3
y = -4
k = 5
Substitute the values into the expression:
4xy + 2k = 4(3)(-4) + 2(5)
Now perform the calculations:
4(3)(-4) = -48
2(5) = 10
Substitute the calculated values back into the original expression:
-48 + 10
Now, perform the addition:
-48 + 10 = -38
Therefore, the value of 4xy + 2k for x=3, y=-4, and k=5 is -38.