Answer:x>1
Step-by-step explanation:
Answer:
6 feet 8 inches
Step-by-step explanation:
The mirror ensures that the line of sight makes similar triangles, so ...
x/10 = 4/6
x = 40/6 . . . . feet = 6 2/3 ft = 6 ft 8 in
The mirror is 6 feet 8 inches from the goal.
A+b=-7
ab=-15
a=-7-b
b(-7-b)=-15
a=-7-b
-b^2-7b+15=0
a=-7-b
b^2+7b-15=0
a=-7-b
b=(-7±sqrt(109))/2
1)
a=-7-b
b=(-7+sqrt(109))/2
b=(-7+sqrt(109))/2
a=-7+3.5-sqrt(109)/2
b=(-7+sqrt(109))/2
a=-3.5-sqrt(109)/2
2)
a=-7-b
b=(-7-sqrt(109))/2
b=(-7-sqrt(109))/2
a=-7+3.5+sqrt(109)/2
b=(-7-sqrt(109))/2
a=-3.5+sqrt(109)/2