Answer:
It isn't necessary but having a positive coefficient for
makes things like completing the square and factoring easier.
Answer: (x,y) -> (7/4x, 7/4y)
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
15x + 16 = 48 - x
16x = 32
x = 2
Plug two in and it fits right in :)


just use the standart recursive for geometric sequence
Answer:
$55.20
Step-by-step explanation:
Create a proportion where x is the cost of 12 lbs of walnuts:
= 
Cross multiply and solve for x:
0.75x = 41.4
x = 55.2
So, for 12 lbs of walnuts, it will cost $55.20