Answer:
a. x=0
b x=-8
c x=49/2
Step-by-step explanation:
a. x2+4=4
subtract 4 from both sides
x2=0
multiply 
2x=0
divide by 2
x=0
b x2 + 16 = 0
multiply 
2x+16=0
subtract both sides by 16
2x=-16
divide by 2
x=-8
c  x2 − 49 = 0
multiply 
2x-49=0
add 49 to both sides
2x=49
divide both sides by 2 
x=49/2
 
        
                    
             
        
        
        
Answer:
21kg
Step-by-step explanation:
We will do this.
11x - 12 = 7x
11x - 4x = 7x
4x = 12
4x/4 = 12/4
x = 3
3 x 7 = 21
Laura weighs 21 kg.
 
        
             
        
        
        
Answer:
6 orders of the 10 burrito special
Step-by-step explanation:
10 burritos for $12
60 burritos for $72.
6 burritos for $7.50
10 burritos for $75
So the 10 burritos for $12 is better.
Hope this helps :D
 
        
             
        
        
        
Answer:
The line equation is given as: 3 y = 2 x - 9
Step-by-step explanation:
Here, Y intercept   is at point ( 0.-3)
So, at x = 0, y = -3
or, C  = -3
 Also, the point on the equation line is (x,y)  = (-9,-9)
Now, by <u>SLOPE INTERCEPT FORM</u> of a line equation,we get:
y = m x + C   :  m  = slope of line  ......... (1)
So, substituting the values of C and (x,y) , we get:
-9  = m (-9)  + (-3)  
or, -9 + 3  = - 9 m
or, m =  -6/-9  = 2/3
or, m = 2/3
Now, substitute the value of m back in to the line equation (1)

Hence, the line equation is given as: 3 y = 2 x - 9.