15
Step-by-step explanation:
A negative number being subtracted makes it positive
5 - -10
5+10 =15
The x² term will be C(5,2)x²·2³ = 80x².
The coefficient is 80.
_____
C(n, k) = n!/(k!·(n-k)!)
C(5, 2) = 5·4/(2·1) = 10
Answer:
4.5 feet of pipe after he cuts it
Step-by-step explanation:
You multiply 2 by 36 to get inches then subtract 18 which is 54 inches and then you divide by 12 to turn it into feet and you get 4.5