A few days ago
Anonymous

if you help me with my math i will love you forever!!!!! algebra!!!!?

the line through (m, -9) and (7,m) has the slope m. find the value of m. please, please help me. i will choose best answer for the real good answer!!!

Top 2 Answers
A few days ago
Syed Faizan Tariq

Favorite Answer

the line through (m, -9) and (7,m) has the slope m. find the value of m.

Solution:

x1 = m ; x2 = -9

y1 = 7 ; y2 = m

slope = m

The slope formula is Slope = (y2-y1)/(x2-x1)

therefore substituting the values;

m = (m – (-9)) / (7 – (+m))

m = (m+9) / (7-m)

m(7-m) = m + 9

7m-m^2 = m+9

m^2-7m+m+9 = 0

m^2-6m+9 = 0

breaking the term 6m

m^2-3m-3m+9 = 0

taking common

m(m-3)-3(m-3)=0

(m-3)(m-3)=0

therefore

m-3=0

so

m=3

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A few days ago
Marge S
slope is rise over run or y/x.

(m-(-9))/(7-m)=(m+9)/(7-m)

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