Not understanding how they got from 10.4y = 175 to y = 16.826 (Pictures)
Chau wants to measure the height of a tree. He sights the top of the tree, using a mirror that is lying flat on the ground. The mirror is 35ft from the tree, and Chau is standing 10.4ft from the mirror, as shown in the figure. His eyes are 5ft above the ground. How tall is the tree? Round your answer to the nearest foot.

Question

Not understanding how they  got from 10.4y = 175 to y = 16.826 (Pictures)
Chau wants to measure the height of a tree. He sights the top of the tree, using a mirror that is lying flat on the ground. The mirror is 35ft from the tree, and Chau is standing 10.4ft from the mirror, as shown in the figure. His eyes are 5ft above the ground. How tall is the tree? Round your answer to the nearest foot.

anonymous · Answer

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anonymous · Answer

Not understanding how they got from 10.4y = 175 to y = 16.826

usukidoll · Answer

those guys divided 10.4 on both sides

usukidoll · Answer

because we need y by itself

anonymous · Answer

They are using proportions because they are similar triangle

usukidoll · Answer

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