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Which is the weakest, negative correlation?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

In the figure below, segment ac is congruent to segment ab: which statement is used to prove that angle abd is congruent to angle acd? a.)triangle acd is similar to triangle abd. b.)triangle acd is congruent to triangle abd. c.)segment a.d. is congruent to segment ac. d.)segment a.d. is congruent to segment dc.

The area (in square feet) of an x-foot-wide sidewalk can be modeled by y=-0.002x^2+0.006x.what is the width of the sidewalk to the nearest foot?