Answer:
The first one
Step-by-step explanation:
Since only the first session is $10, it wouldn't be 10x. 
The second session is $5, and it will never be $10 again, so $5 sessions are unlimited which would be 5x. 
So the answer is y = 10 + 5x 
(sorry if i didnt explain well)
 
        
             
        
        
        
Answer:
18
Step-by-step explanation:
You need to find the least common multiple of 9 and 6 - that is 18. In this case you buy 2 packages of pencils and 3 package of pens.
 
        
                    
             
        
        
        
Answer: -10x
Explanation: Multiply -2 by 5x
        
             
        
        
        
Answers:
- Total amount of money =  220 dollars
- Amount Farah gets = 100 dollars
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Explanation:
- F = amount Farah gets
- S = amount Shaiyara gets
- Z = amount Zahin gets
The money is divided in the ratio 10:7:5
This means that 
for some positive real number x. 
Since Shaiyara gets $20 more than Zahin, we can say,
S = Z+20
Let's plug in S = 7x and Z = 5x and solve for x
S = Z+20
7x = 5x+20
7x-5x = 20
2x = 20
x = 20/2
x = 10
Therefore,
- F = 10x = 10*10 = 100
- S = 7x = 7*10 = 70
- Z = 5x = 5*10 = 50
The ratio F:S:Z becomes 100:70:50 which reduces fully to 10:7:5 after dividing all three parts by the GCF 10.
The total sum of money shared is 100+70+50 = 220 dollars and Farah gets $100 of that total.
 
        
             
        
        
        
D 19 in2
find the area of a square, width times height
then find the area of the triangle, width times height divided by 2