SOLUTION: Hello boys, full working out would be much appreciated, want to make sure I got these questions correct. 1) (6,3) is the midpoint of the line joining the points with coordinate (

Algebra ->  Points-lines-and-rays -> SOLUTION: Hello boys, full working out would be much appreciated, want to make sure I got these questions correct. 1) (6,3) is the midpoint of the line joining the points with coordinate (      Log On


   

Question 1109234: Hello boys, full working out would be much appreciated, want to make sure I got these questions correct.
1) (6,3) is the midpoint of the line joining the points with coordinate (-4,y) and (x,-6). The value of x+y is:
2) Find the magnitude of the angle that the line with equation y=-2x+4 makes with the positive direction of the x axis?
3) If two lines 6x-y+5=0 and ax+2y-7=0 are parallel then a equals?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
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1) (6,3) is the midpoint of the line joining the points with coordinate (-4,y) and (x,-6). The value of x+y is:
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%28-4%2Bx%29%2F2=6
x-4=12
x=16
-
%28y-6%29%2F2=3
y-6=6
y=12
-
x%2By=16%2B12
highlight%2828%29


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3) If two lines 6x-y+5=0 and ax+2y-7=0 are parallel then a equals?
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%286%2F1%29=-%28a%2F2%29
6=-a%2F2
highlight%28a=-12%29