Which math expression represents the phrase?

4 times the sum of a number and 9

A.
4 · n + 9

B.
4 · (n · 9)

C.
4 + (n + 9)

D.
4 · (n + 9)

Question

Which math expression represents the phrase? 
 
4 times the sum of a number and 9
 
 A.
4 · n + 9
 
 B.
4 · (n · 9)
 
 C.
4 + (n + 9)
 
 D.
4 · (n + 9)

anonymous · Answer

Just trying to see if its in perenthesis or not.

jim_thompson5910 · Answer

4 · n + 9 only has you multiplying 4 by n

but the problem says "4 times the sum". You want something where you are multiplying 4 by ALL of n+9

carlyleukhardt · Answer

Oh wait D is the real answer, sorry >.>

anonymous · Answer

So it would be d?

anonymous · Answer

Sisters math problem. Can anyone help?

Dinner for eight people cost $156 plus a $30 tip for the waiter. The eight people decided to split the cost equally. 
 
Which expression shows how much each person paid?
 
 A.
(156 + 30) ÷ 8
 
 B.
(156 ÷ 8) + 30
 
 C.
156 + (30 ÷ 8)
 
 D.
8 ÷ (156 + 30)