Hello,
Yes of course 0.4 or 4/10 is a rational number :)
Have a nice day :)
Answer:
Sugar = 1-2/5 pounds, Flour = 3-1/2 pounds
Together = 5-9/10 pounds
Step-by-step explanation:
sugar = 7(2/10)
flour = 7(5/10)
sugar + flour = 7(2/10) + 7(5/10)
sugar = 14/10 or 1-2/5 pounds
flour = 35/10 or 3-1/2 pounds
1)
is simplified into 
2)
is simplified into 
3)
is simplified into 
4)
is simplified into 
5)
is simplified into 
Step-by-step explanation:
We need to solve the polynomials.
1) 
Solving:

So,
is simplified into 
2) 
Solving:

Expanding:

So,
is simplified into 
3) 
Solving:

Expanding:

So,
is simplified into 
4) 
Solving:

Expanding:

SO,
is simplified into 
5) 
Solving:

Expanding:

So,
is simplified into 
Keywords: Solving Polynomials
Learn more about solving Polynomials at:
#learnwithBrainly
You can factor out the square root of two from the num and denom of this fraction leaving you with 1/3 or 1.33