WhirlyWave
11.05.2021 •
Mathematics
What is the distance between the integers (-15) and (-9) on a number line?
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Ответ:
The answer is -7, because -15-9=-7
Ответ:
For the second problem you subtract 5x from both sides and are left with -4y=-5x+28 and then you divide both sides of the equation by -4 to get y alone and that leaves you with y=5/4x-7
So looking at the slopes -4/5 and 5/4 which they are reciprocals of each other so these lines are perpendicular.