If a = –7and b = –3, what is the value of the expression 4a + ab?
First, substitute the values of a and b into the expression:
4a + ab
= 4(-7) + (-7)(-3)
Now, simplify the expression:
= -28 + (21)
= -7
Therefore, the value of the expression 4a + ab when a = -7 and b = -3 is -7.