1. 7 + 15 + 12 + 5 + 5 + 10 = 54
54 x 2.5 = $135
The correct answer is $135
2. A^2 + 9^2 = 22^2
A^2 + 81 = 484
A^2 = 403
Square root of a and 403
A= 20.7
20.7 + 22 + 9 = 51.7
The correct answer is (3)
        
             
        
        
        
<h2>
Answer: 1/5 or 0.2
_____________________________________</h2><h3>
Isolate the variable by dividing each side by factors that don't contain the variable.
Exact Form: x = 1/5
Decimal Form:
x = 0.2</h3><h3>
______________________________________________</h3>
Hope this helps!
Also can I please have Brainliest...? 
<em>Only if I'm right of course...</em>
 
        
        
        
Using binomial distribution where success is the appearing of any of the top 10 most common names, thus probability of success (p) is 9.6% = 0.096 and the probability of failure = 1 - 0.096 = 0.904. Number of trials is 11.
Binomial distribution probability is given by P(x) = nCx (p)^x (q)^(n - x)
Probability that none of the top 10 most common names appears is P(0) = 11C0 (0.096)^0 (0.904)^(11 - 0) = (0.904)^11 = 0.3295
Thus, the probability that at least one of the 10 most common names appear is 1 - 0.3295 = 0.6705
Therefore, I will be supprised that none of the names of the authors were among the 10 most common names given that the probability that at least one of the names appear is 67%.
        
             
        
        
        
<span><span>tan^2</span>(x) is the answer.</span>