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keke6361
25.06.2019 •
Mathematics
Aline passes through the point (-2,7) and had a slope of -5 what is the value of a if the point (a,2) is also on the line -7 -1 1 7
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Ответ:
b. -1
Step-by-step explanation:
you find the point and then go down 5 vertically within one horizontally to show the -5 slope and it will leave you at (-1, 2)
Ответ:
a = -1
Step-by-step explanation:
The general equation for a straight line is y = mx+c, where m is the gradient/ slope, so m = -5. The first thing we need to do is find c, which we do by plugging in the x and y values that we already know: y = 7 and x = -2
7 = -5*(-2) + c
7 = 10 + c
c = 7-10 = -3
Now, we have the general equation of y = -5x -3 and we can use this to find a.
We'll treat a as x and y will be equal to 2:
2 = -5a -3
5 = -5a (Divide both sides by 5)
-a = 1 (now by -1)
a = -1
Ответ:
(−9,−9)
Equation Form:
x=−9,y=−9
Step-by-step explanation:
hope this helps have a great day