+0  
 
0
47
3
avatar+4 

so if a slope of two lines is 4/a  and -7, determine the value of a if the lines are parallel, and if they are perpendicular.

 Dec 15, 2020
 #1
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Parallel means the slope is the same   so     4/a = -7       solve for 'a'

 

Perpindicular means   one slope is   -1/other

so   4/a = - 1/-7

        4/a = 1/7    solve for 'a'

 Dec 15, 2020
 #2
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yes i understood that far, but what is the solution to a?

Guest Dec 15, 2020
 #3
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You SHOULD know how to solve for 'a'   given:

4/a = -7    multiply both sides by a

4 = -7a     divide both sides by 7

-4/7 = a   

 

You should do the second one......

 Dec 15, 2020

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