Answer:
First, two lines are perpendicular if one has slope m, and the other has slope -1/m (Not 1m as Alan says)
That is the first error of Alan.
Now, there is another error.
If m = 0, then -1/m tends to minus infinity (in this case we would have a vertical line).
But we can not really divide by zero, so we should state that:
m can not be zero, if a line is horizontal, the perpendicular line must be vertical.
9514 1404 393
Answer:
x = 12.5
Step-by-step explanation:
The value of x is part of the value of an angle in a triangle where the other angles are known. This suggests that the relevant theorem is the "angle sum theorem," which tells you <em>the sum of angles in a triangle is 180°</em>.
This gives you the equation ...
60° +60° +(4x+10°) = 180° . . . . total of all angles is 180°
4x +130° = 180° . . . . . . . . . . collect terms
4x = 50° . . . . . . . . . . . . subtract 130° from both sides
x = 12.5° . . . . . . . . . divide both sides by 4
Answer:
mp=4500
let discount %be x
sp=mp-discount %of mp=4500-x/100×4500=4500-45x
Step-by-step explanation:
sp with 10%vat=sp+vat%of sp
4400=4500-45x+10/100(4500-45x)
4400-4500=(-450x+(4500-45x)/10
-1000=(-450x+(4500-45x)
-1000-4500=-495x
495x=5500
x=5500/495=11.11%
Answer:
n=20
Step-by-step explanation:
The answers are:
3:d
4:c
5:b
6:c Note: I am not 100% sure.
