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san4es73 [151]
2 years ago
10

Hi please help! i’m somehow stuck on this

Mathematics
1 answer:
pochemuha2 years ago
6 0

Answer:p=12

Step-by-step explanation:

(9p)+(p+21)+(p+27)=180

9*12=108

12+21=33

12+27=39

108+33+39=180

so p=12

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Write the equation of a line perpendicular to 5x−9y=−8 that passes through the point ​(−5​,8​).
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Step-by-step explanation:

Rewrite the equation in standard form:  y = (5/9)x+(8/9).  [y=mx+b]

A line perpendicular to this would have a slope that is the negative inverse of the original slope (5/9), which would make it -(9/5).  The y-intercept would also change, but we don't know the value, yet.  For now, we'll use "b" for the y-intercept.  This results in a perpendicular line:

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We can calculate b, the y-intercept, by using the point (-5,8) and solving for b.

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The line perpendicular to 5x−9y=−8 that passes through the point ​(−5​,8​) is

y = -(9/5)x - 1

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3 years ago
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