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3 years ago

7

A certain tree was 5 1/3 feet tall when it was first planted. A few years later, the tree is 4 times as tall as it was when it w

as first planted. How much has the tree grown since it was first planted?

1 answer:

Fynjy0 [20]3 years ago

8 0

Answer:

21 1/3 ft.

Step-by-step explanation:

5 1/3= original height

4 times the growth

5 1/3 times 4=

Answer: 21 1/3 ft. tall

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Using completing the square solve for x<br> X^2-10x-9=0

Lady bird [3.3K]

X^2 - 10x - 9 = 0
first we will move the constant term to the other side
x^2 - 10x = 9
then, to both sides we will add the number that makes the polynomial on the left a perfect square trinomial. Take half of the coefficient of x, then square it. half of the coefficient of x (-10) is -5, and -5 squared is 25. so:
x^2 - 10x + 25 = 34
factor the perfect square trinomial
(x - 5)^2 = 34
x - 5 = plus or minus sqrt(34)
x = 5 plus or minus sqrt(34)

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Answer with Step-by-step explanation:

We are given that displacement of wave

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Amplitude=A=1.5 cm

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$\lambda=\frac{2\times 3.14}{0.68}=9.2 cm$

Using $\pi=3.14$

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$T=\frac{2\times 3.14}{37}=0.17 s$

The period of the wave=0.17 s

Speed of the wave= $\nu \lambda=\frac{\lambda}{T}=\frac{9.2}{0.17}$

Speed of the wave=54.1 cm/s

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