Answer:
20 Riyals you receive if you exchange 5 dollars .
Step-by-step explanation:
As given
The money used in Saudi Arabia is the Riyal.
The exchange rate is 4 Riyals to 1 dollar. 
i.e 
4 Riyals = 1 dollar. 
Now calculate for 5 dollars.
5 × 4 Riyals = 5 × 1 dollars
20  Riyals = 5 dollars 
Therefore 20 Riyals you receive if you exchange 5 dollars .
 
        
             
        
        
        
Answer:
x = 8, y = 
Step-by-step explanation:

 Both 8 and x sides are congruent so they're equal.
      Both 8 and x sides are congruent so they're equal.
 Add 64 + 64.
      Add 64 + 64.
 Square root 128
           Square root 128 

Final answers: x = 8, y = 
 
        
                    
             
        
        
        
Answer:
Number of customers (double taco)= 45
Step-by-step explanation:
Giving the following information:
Double taco order rate= 15% = 0.15
Total number of customers= 300
<u>To calculate the number of customers that order two tacos, we need to use the following formula:</u>
Number of customers (double taco)= Double taco order rate*total number of taco
Number of customers (double taco)= 0.15*300
Number of customers (double taco)= 45
 
        
             
        
        
        
Answer:
For #2: It's C. 17 nickels and 15 quarters. 
Step-by-step explanation:
17*5= 85
15*25= 375
375+85= 460
add in the decimal:
17* 5 cents= $.85
15* 25 cents= $3.75
$3.75+ $.85= $4.60