Answer:
A salad costs $2.50
A sandwich costs $4.50
A drink costs $1.25
Step-by-step explanation:
Let x represent the salad, y represent the sandwich, and z represent the drink.
Since three salads, two sandwiches, and one drink cost $17.75:
3x + 2y + z = 17.75  (1)
Since one salad, one sandwich, and three drinks cost $10.75:
x + y + 3z = 10.75  (2)
Since a salad costs twice as much as a drink:
x = 2z  (3)
Multiply the equation 2 by -2 then, sum the equation 1 and equation 2:
-2x - 2y - 6z = -21.50
3x + 2y + z = 17.75
→ x - 5z = -3.75
Replace the x with 2z using equation 3:
2z - 5z = -3.75
-3z = -3.75
z = 1.25
x = 2z → x = 2.50
x + y + 3z = 10.75 → 2.50 + y + 3.75 = 10.75 → y + 6.25 = 10.75 → y = 4.50
 
        
             
        
        
        
Answer:  14
<u>Step-by-step explanation:</u>
Consecutive even numbers would be {2, 4, 6, 8, 10, ...}
Let x represent the smallest number, then x + 2 is the middle number and x + 4 is the largest number.
1st number: x
2nd number: x + 2
3rd number: x + 4
1st number + 2nd number + 3rd number = Sum
       (x)        +      (x + 2)       +      (x + 4)      =  48
                                                       3x + 6   =  48
                                                       3x          = 42
                                                         x           = 14
1st number: x           ⇒ x = 14
2nd number: x + 2   ⇒ 14 + 2 = 16
3rd number: x + 4    ⇒ 14 + 4 = 18
<u>Check:</u>
14 + 16 + 18 = 48 
  
 
        
             
        
        
        
Answer:
Only C is correct
Step-by-step explanation:
59 is bigger than -59 not smaller so A is incorrect
0 is smaller than 76 not bigger do B is also incorrect
-76 is smaller than -59 according to number line so option C is correct
 
        
                    
             
        
        
        
Answer:
The answer is 12.36 
Step-by-step explanation:
I just did the assignment and guessed and got them wrong and it said this is the right answer so yeah.
You're welcome!! :D
 
        
                    
             
        
        
        
Answer:
y = -x
Step-by-step explanation:
The line has a slope of -1 and it passes through point (0,0)
Taking another point (x,y) on the line;
Slope = change in y ÷ change in x
For our case; slope = 
Cross multiplying this gives;
y = -x