Answer:          D. 8x² + x + 3
Sum means the answer to an addition problem. To find the sum of polynomials, we will add like terms.
<h2>What are like terms?</h2>
Like terms can be combined using addition or subtraction and have the same variables. Constants are also like terms with each other because they have no variables.
<h2>Solve</h2>
(4x² + 1) + (4x² + x + 2)      Starting equation from the question
= 4x² + 1 + 4x² + x + 2       Remove brackets
= 4x² + 4x² + x + 1 + 2       Rearrange to group like terms together
= 8x² + x + 1 + 2                Add like terms with the same 'x²' variables
= 8x² + x + 3                     Add like terms that are constants
Learn more about adding polynomials here:
brainly.com/question/1311115
 
        
             
        
        
        
Answer:
100% true....
subtracting 19 from both sides brings you to 2x=8, so x=4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
20 dvds
Step-by-step explanation:
find how much each block is worth
8 blocks= 32
32/8=4
each block is worth 4
how much is 5 blocks equal to?
5(4)=20
 
        
             
        
        
        
Answer:
The probability is 0.31
Step-by-step explanation:
In this question, we are tasked with calculating the probability that a random plumber called at Denver will charge an amount greater than $86 given the mean and the standard deviation.
Firstly, we calculate the standard score of $86 using the mean and the standard deviation.
Mathematically;
z-score = (x-mean)/SD
where x = 86, mean = 84 and SD = 4
z-score = (86-84)/4 = 2/4 = 0.5
Hence, we want to calculate P(z ≥ 0.5)
Using standard table 
P( (z ≥ 0.5) = 1 - P(z ≤ 0.5) = 1 - ( 0.19146 + 0.5) = 0.30854
To the nearest hundredth = 0.31
 
        
             
        
        
        
Answer:
sorry i do not know
Step-by-step explanation: