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10.
Plans for a bridge are drawn on a coordinate grid. One girder of the bridge lies on the line y = –9x – 9. A perpendicular brace passes through the point (–1, 7). Write an equation of the line that contains the brace.
y – 1 = –1/9(x + 7)
x – 7 = –9(y + 1)
y – 7 = 1/9(x + 1)
y – 7 = –9(x + 1)
 one year ago
 one year ago
10. Plans for a bridge are drawn on a coordinate grid. One girder of the bridge lies on the line y = –9x – 9. A perpendicular brace passes through the point (–1, 7). Write an equation of the line that contains the brace. y – 1 = –1/9(x + 7) x – 7 = –9(y + 1) y – 7 = 1/9(x + 1) y – 7 = –9(x + 1)
 one year ago
 one year ago

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NickRBest ResponseYou've already chosen the best response.1
ok so what we are going to do is find the inverse equation start by using the rule The gradient of the new line is (1/grad of old line).
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
what do you mean (1/grad of old line). im a little confused pal
 one year ago

NickRBest ResponseYou've already chosen the best response.1
so now take that and make a new equation y=(1/9)x+b
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
y – 7 = 1/9(x + 1) thanks pal
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
Write the equation for the horizontal line that contains point G(–8, 8). could you give me another hand please
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
alright cool thanks man youre really helping
 one year ago

NickRBest ResponseYou've already chosen the best response.1
ok whats the next problem?
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
Write the equation for the horizontal line that contains point G(–8, 8).
 one year ago

NickRBest ResponseYou've already chosen the best response.1
so if its a horizontal line the only point we need to worry about is y correct
 one year ago

NickRBest ResponseYou've already chosen the best response.1
so this is really simple your answer is y=8 http://answers.yahoo.com/question/index?qid=20080823113546AAsKIuB
 one year ago

NickRBest ResponseYou've already chosen the best response.1
we dont need to worry about the slope because it is 0
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
thanks man could you help me write the equation please?
 one year ago

NickRBest ResponseYou've already chosen the best response.1
np you understand y right?
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
ya because its just a straight line. theres no x
 one year ago

NickRBest ResponseYou've already chosen the best response.1
ok let me know if you need any more help
 one year ago

lucwexBest ResponseYou've already chosen the best response.1
alright will do thanks again bud
 one year ago
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