Answer:
Percentage of students who tried both questions = 
Percentage of students who tried at least one question = 
Step-by-step explanation:
Given: 25 students take a midterm psychology exam, 15 answered the first of two bonus questions, 11 answered the second bonus question, and 1 didn't bother with either one.
To find: percentage of students who tried both questions and percentage of students who tried at least one question
Solution:
Let A denotes students who answered the first of two bonus questions and B denotes students who answered the second bonus question.
Let U denotes the universal set denoting students who take a midterm psychology exam.




Percentage of students who tried both questions = 
Percentage of students who tried at least one question = 
 
        
             
        
        
        
Answer:
The value of x is equal to 109
 
        
             
        
        
        
Answer:
x^4 - 11·x^2 + 18 = 0
I use Vieta's formulas
-9·(-2) = 18 and -9 + (-2) = -11
(x^2 - 9)·(x^2 - 2) = 0
(x + 3)·(x - 3)·(x + √2)·(x - √2) = 0
 
        
             
        
        
        
Answer:
3/5 pages per hour
Step-by-step explanation:
We want to find pages per hour
1/5 pages ÷1/3 hour
Copy dot flip
1/5 * 3/1
3/5 pages per hour
 
        
             
        
        
        
-(7c-18)-2c> 0
First you have to distribute the minus sign in order to combine like terms
EX: -7c+18-2c> 0 then combine like terms which would get you -9c and solve for c
Ex: -9c +18> 0
   then minus 18 from both sides  to get -18
Next divide -18 by -9 to have c<2 because when you divide by a negative the signs would flip