Final answer:
To simplify the expression 3+(a+4)(8-), use the distributive property and perform the necessary calculations. The simplified expression is 37 + 9a.
Step-by-step explanation:
The expression given is 3+(a+4)(8-).
To simplify the expression, we can use the distributive property:
3 + (a+4)(8-) = 3 + (a+4)(8) - (a+4)(-)
Now, we can solve each part separately:
(a+4)(8) = 8a + 32
(a+4)(-) = -a - 4
Substituting the values back into the original expression, we get:
3 + 8a + 32 - (-a - 4)
Combine like terms:
3 + 8a + 32 + a + 4
Simplify:
37 + 9a