A 45mm line is drawn on a drawing which represents the 1st-floor plan of an office building.  If the scale of the drawing is 1:50 what is the length that this line represents i for the office building?

answer: 0.64

step-by-step explanation:

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secant-secant formula:

(whole secant) x (external part) =           (whole secant) x (external part)

(8+y-2) *8=                                           (y+4+6) *6

(y+6)*8 = (y+10) *6

distribute

8y+48 = 6y +60

subtract 6y from each side

2y +48 = 60

subtract 48 from each side

2y = 12

divide by 2

y = 6

sv =     (y+4+6)

sv   = 6+4+6

sv = 16

3x-x+2=4 i think that's is the answer, and i hope it you