Help? which one should I choose
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Answer
Find out the length of the pole .
To proof
As given
The pole casts a 12-foot shadow when the sun is at a 40° angle of elevation.
x represented the length of pole .
As shown in the diagram
By using the trignometric identity
tan40° = 0.839099631 ( approx )
Put in the above
x = 12 × 0.839099631
x = 10.1 foot (approx)
Therefore the length of the pole in 10.1 foot (approx) .
Answer:
1. X^2+1/2x =
2. X^2+2x-3 =
3. (2x-3)^2 = (2x-3)(2x-3)
4. X^3+2x^2-19x-20 =
Step-by-step explanation:
Each expression can be written as a product of linear factors as follows
1. X^2+1/2x ⇒
=
Hence, X^2+1/2x =
2. X^2+2x-3 ⇒
Hence, X^2+2x-3 =
3. (2x-3)^2 ⇒
Hence, (2x-3)^2 = (2x-3)(2x-3)
4. X^3+2x^2-19x-20 ⇒
First,
∴
Hence, X^3+2x^2-19x-20 =