Answer:
x=5,y=-12
Step-by-step explanation:
You add the two equations to get: 4x=20
Then you get x=5.
You plug this in to x-y=17 to get y=-12
The answer is x=5 and y=-12
 
        
             
        
        
        
Answer: 3253
Step-by-step explanation:
Given : A test requires that you answer either part A or part B.
 Part A consists of 7 true-false questions.
i.e.  there are 2 choices to answer each question.
Now, the number of ways to answer Part A :  (1)
    (1)
 
Part B consists of 5 multiple-choice questions with one correct answer out of five.
 i.e.  there are 5 choices to answer each question.
Now, the number of ways to answer Part B :  (2)
                           (2)
Now, the number of  different ways to completed answer sheets are possible=   [Add (1) and (2) ]
          [Add (1) and (2) ]
 
        
             
        
        
        
To write a percent as a decimal- move the decimal point two places to the left and divide by 100.
Explanation:
Lets take an example.
We have to convert 25% into decimals. 
So, we will divide 25 by 100 , 
Here, we can see that we have moved the decimal to two places on the left side.
 
        
                    
             
        
        
        
Answer:
36
Step-by-step explanation:
2 x 3 x 3 x 2 = 36