Answer:
x = 2
Step-by-step explanation:
Solve the two equations simultaneously....whereby you substitute y = 2x - 6 from the above equation into the second equation...
where...; 5x + 10(2x - 6) = -10
5x + 20x - 60 = -10...then move the variables with x to one side...
5x + 20x = -10 + 60
25x = 50
;Therefore...the value of x at intersection point = 2
 
        
             
        
        
        
It's 30 degrees 
Step-by-step explanation:
Hope this helps! 
 
        
             
        
        
        
Answer:
 2:5
Step-by-step explanation:
The ratio of a dimension on Figure B to the corresponding dimension on Figure A is ...
 4:10 = 8.6:21.5 = 10:25 = 2:5 or 1:2.5
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In such problems, it isn't clear if the desired answer is the ratio of two integers or if it is 1 : (something). We have expressed it both ways, so you can use the answer that matches your requirement.
 
        
             
        
        
        
Answer:
Correct choice is D
Step-by-step explanation:
Given the system of two equations:

Fro mthe first equation 

Substitute into the second equation  instead of y:
 instead of y:

Note that  then the second equation will take look
 then the second equation will take look

 
        
                    
             
        
        
        
Answer:
50
Step-by-step explanation:
ABCD is quadrilateral. Sum of all the angles in a quadrilateral is 360. This means angle ADC will be 130. 
ADE is a straight line. Angle ADC and angle CDE should sum up to 180. From here we can infer that angle CDE=x is 50