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mojhsa [17]
3 years ago
14

How tall is the tree? A. 8ft B. 15 Ft C. 18 FT D. 72 ft

Mathematics
2 answers:
Kobotan [32]3 years ago
8 0
We are supposed to assume ratio of similar triangles (since he is looking at mirror, angle of incendence=angle of reflection so all 3 angles are same and the triangles are similar)
use ratio
ratio of height of small triangle to base of small triangle=ratio of height of large triangle to base of large triangle
so6:2=h:246/2=h/243=h/24multiply both sides by 2472=hthe tree is 72ft tall
answer is D

Nostrana [21]3 years ago
5 0
The answer is d multiple the andeers
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CNBD

Step-by-step explanation:

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Answer:

2. x = -16       y = -10.5

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Step-by-step explanation:

2.

in my stategy, you plus -5x + 8y = -4 with 6x - 8y = -12

+8y and -8y could delete each other, then y will be gone.

-5x + 6y = 1x = x because -5 + 6 = 1

so then you could got x = (-4) + (-12) which means x = -16

if x = -16 that will then means

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3.

This question has already given you that y = -5

that means,  3x + 6 × (-5) = -18

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3x = -18 - (-30)

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4.

Like the 2. qestion, you first plus the 2 equation together,

+9y + -9y = 0

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than means

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x = 3

then put the x = 3 in one of the equation.

4 x 3 - 9y = 10

12 - 9y = 10

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