4(7d+9)
To simplify the expression 4(7d+9), you can distribute the 4 to each term inside the parentheses:
4 * 7d = 28d
4 * 9 = 36
So the simplified expression is 28d + 36.
4 * 7d = 28d
4 * 9 = 36
So the simplified expression is 28d + 36.