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irinina [24]
3 years ago
14

F(x)=x^2-5. a) f(x)=4

Mathematics
1 answer:
inysia [295]3 years ago
3 0
Substitute in x to get:
4^2 = 16
16 - 5 = 9
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Corresponding sides of similar triangles are proportional.

So \dfrac{\text{length of the shadow of the shorter tree}}{\text{height of shorter tree}}=\dfrac{\text{length of the shadow of the bigger tree}}{\text{height of bigger tree}}\\\\=\dfrac{\text{length of the shadow of the shorter tree}}{20}=\dfrac{18}{50}\\\\\Rightarrow\ \text{length of the shadow of the shorter tree}=\dfrac{18}{50}\times20\\\\\Rightarrow\ \text{length of the shadow of the shorter tree} = 7.2

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3 years ago
Please answer this correctly
Leto [7]

Answer:

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Step-by-step explanation:

8 0
4 years ago
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