Do u want numbers or are there options?
<u>Answer:</u>
Oak tree is 33 ft tall.
<u>Step-by-step explanation:</u>
We know that Irene places a mirror on the ground and walks backwards such that the mirror is in between her and the oak tree (as shown in the attached picture).
Given the distance of Irene's eyes from ground, distance between oak tree and mirror and distance between mirror and Irene, we are to find the height of the tree.
For this, we will use the ratio method:

T = 33 ft
Answer:
Step-by-step explanation:
A(10,10) B(b,10b)
ax-2y=30

Divide both parts of the equation by 10:
a=5
Hence,
5x-2y=30
5(b)-2(10b)=30
5b-20b=30
-15b=30
Divide both parts of the equation by -15:
b=-2
Thus,
a=5 b=-2


Divide both parts of the equation by 2:
2.5x-15=y

The equation of the perpendiqular bisector
Hence,

So it's easier to calculate if you figure out how much time it took her to finish 25% of the wall. Since it took her 45 minutes to do 75%, it took her 15 minutes to do 25%. Then you just multiply.
Therefore, it takes her 60 minutes to finish building her wall.
question 1: you must set the equation to 0 in order to solve the quadratic equation