Answer:
a. (3x^4 + 6 ) + (2x^2)
b. (X^3 ) + (-x -7)
c. (4.6x^4) + (-1.5x^2)
Step-by-step explanation:
For the first one, we have to write to polynomials, which equal 3x^4 + 2x^2 +6
One possible solution is (3x^4 + 6 ) + (2x^2)
For b, we can do,
(X^3 ) + (-x -7)
And finally for c, we can write, 
(4.6x^4) + (-1.5x^2)
 
        
             
        
        
        
Answer:
60
Step-by-step explanation:
Steps to solve "54 is 90 percent of what number?"
We have, 90% × x = 54
or,  
90/100  × x = 54
Multiplying both sides by 100 and dividing both sides by 90,
we have x = 54 ×  100/90  
x = 60
If you are using a calculator, simply enter 54×100÷90, which will give you the answer.
 
        
             
        
        
        
Answer:
Step-by-step explanation: The answer to your question is 15 pretzels.To figure this out, you first multiply 8.99 by 4 since he did buy 4 pizzas and each pizza is 8.99. Then once you do that, you should come up with 35.96. Then subtract 50.81 from 35.96,which should give you 14.85. Then just divide 14.85 by 0.99 to figure out the amount of pretzels he bought.It should give you 15.Hope this helps!!!!
Please give brainliest!!!☺ 
 
        
                    
             
        
        
        
Answer:
   3×10^4
Step-by-step explanation:
The desired factor is found by calculating the ratio of the two numbers:
   k = (9×10^2)/(3×10^-2) = (9/3)×10^(2 -(-2)) = 3×10^4
The first number is 3×10^4 = 30,000 times as much as the second number.
 
        
             
        
        
        
Answer:
1 or I
Step-by-step explanation: