To answer this question we can propose the following equation:

Where:
x is the number of weeks elapsed.
d is the debt depending on the weeks.
Robert promised to pay at least $ 67 each week.
 Therefore, after 5 weeks the debt of rober should be:
 
 
 Then scenario A) is possible because  .
.
 After 6 weeks:
 
 
 Then scenario B) is possible because  .
.
 After 7 weeks
 
 
 Then scenario C) is possible because  .
.
 After 8 weeks
 
 
 So scenario D) is NOT possible because 
 Finally the correct answer is option D.
 
        
             
        
        
        
5 cent = 0.05x
<span><span>2 cent  </span>= 0.02(x+50)</span>
4 cent = 0.04(2x-10)
 
0.05x + 0.02(x+50) + 0.04(2x-10)
0.05x + 0.02x +1 + 0.08x -0.4 = 4.35
0.15x +0.6 = 4.35
0.15x = 3.75
X = 3.75 / 0.15 = 25
<span> 25 5 cent stamps (
25*0.05 = 1.25)</span>
25+50 = 75 2 cent stamps ( 75*0.02 = 1.50)
2*25 =50-10 = 40 4 cent stamps ( 40*0.04 =1.60)
 
1.25 + 1.50 +1.60 = 4.35
5 cent = 25
2 cent = 75
4 cent = 40
 
        
             
        
        
        
Answer:
There are five different ways, in which we can arrange the photos.
Step-by-step explanation:
There are five  different ways to arrange the photos.
1. 5 photos in each 4 rows. 
2. 4 photos in each 5 rows.
3. 2 photos in each 10 rows.
4. 10 photos in each 2 rows.
5. 20 photos in a single row.
 
        
             
        
        
        
Answer:
They most likely used an experiment with patients randomly assigned to take the medicine or not take the medicine
Step-by-step explanation:
I got it correct on my test for sure!