Question 465991: Find the distance between the two points. Round an approximate result to the nearest hundredth.
( -1,-1) and ( 3,-7)
Find the midpoint of the line segment having the given endpoints.
( 8,-4) and ( -7,8)
Determine whether the lines are parallel, perpendicular, or neither.
y + x = -2 and y - x = -2
Without graphing, identify the slope and the y-intercept.
y = 3x + 9
Solve the quadratic equation.
x2 - x = 72
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website!
Hi,
Please keep these formulas for reference:
D = 
( -1,-1)
( 3, -7) D =  to the nearest hundredth
Midpoint Pt(x,y): (  ,  )
( 8,-4)
( -7,8) M = (1/2,2)
y + x = -2 OR y = (-1/1)x-2
y - x = -2 OR y = (1/1)x-2 Lines are perpendicular: Solpes negative reciprocals
y = 3x + 9 |slope m = 3 and y-inteecept is Pt(0,9)
point-slope formula,  will come in handy as well
x^2 - x - 72 = 0
factoring
(x-9)(x+8)= 0
(x-9)=0
(x+8)= 0 x = 9 and x = -8 are the solutions
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