4(s+3)
or it could be
(s+3) + (s+3) + (s+3) + (s+3)
I have the same problem. I think it is 4.
A(n)=330 Plug in 10 for n
Step-by-step explanation:
our equation is x²+16x = -44
- x²+16x= -44
- x² is the first term so weill have in the middle 2*x* a number
- x²+2*x*8 = -44
- the third term is 8² wich is 64 so we will add it in both sides
- x²+2*x*8+64 = -44+64
- (x+8)² = 20
Now that we have completed the perfect square let's solve the equation
- (x+8)² = 20
- x+8 =
or x+8= -
- x = -8+
or x = -8- 
so the first answer is the correct one
64; 8 +/- 
40min*1.05=42min they spent 42 min together
ps: check the multiplication it's 01:30 and I did that in head