Question

PLEASE HELP MEEEEEEEEE!!!!!!!!! MUST ANSWER BOTH!!

Answer 1

(0,1)(-2,5) 

slope = (5-1)/(-2-0) = 4/-2 = -2 , b = 1

perpendicular to the line AB, so slope of equation = 1/2 = 0.5

passing point (7,6)
y = mx + b
6 = 0.5(7) + b
6 = 3.5 + b
b = 2.5

equation
y = 0.5x + 2.5

answer is A. y = 0.5x + 2.5 (first choice)

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A(-4,3)

B(0,2)

C(2,4)

D(0,-3)

 

Length of AB = square root [(x2 – x1)^2 + (y2 - y1)^2]

Length of AB = square root [(0 + 4)^2 + (2 - 3)^2]

Length of AB = square root [16 + 1]

Length of AB = square root (17)

 

Length of BC= square root [(x2 – x1)^2 + (y2 - y1)^2]

Length of BC = square root [(2 - 0)^2 + (4 - 2)^2]

Length of BC = square root [4 + 4]

Length of BC = square root (8)

 

Length of CD= square root [(x2 – x1)^2 + (y2 - y1)^2]

Length of CD = square root [(0 - 2)^2 + (-3 -4)^2]

Length of CD = square root [4 + 49]

Length of CD = square root (53)

 

Length of DA= square root [(x2 – x1)^2 + (y2 - y1)^2]

Length of DA = square root [(-4 - 0)^2 + (3 + 3)^2]

Length of DA = square root [16 + 36]

Length of DA = square root (52)

 

Perimeter = square root (17) + square root (8) + square root (52) + square root (53) = 21.44

 

Answer is B. 21.4 (second choice)

Answer 2

The first one is C y=-2x+20 the second ones is 17.6