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Marta_Voda [28]

3 years ago

6

** If you your answer contains an irrational number (a never ending decimal number) leave the number under the square root symbo

l.

1 answer:

sdas [7]3 years ago

4 0

The answer is the square root of 23 i.

(The “i” is outside of the square root symbol, and the 23 is positive).

Hope this helps! (:

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If w 1,-5> and y=<2,3>,find 2w+y

kolezko [41]

Answer:

Step-by-step explanation:

Yes

But no

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7 0

3 years ago

Two sides of a triangle have lengths 9 m and 13 m. The angle between them is increasing at a rate of 0.02radians /min. How fast

Olin [163]

Answer:0.175 m/s

Step-by-step explanation:

Given

Two sides of length 9 and 13 m

angle between them is increasing at an angle of 0.02 rad/min

rate of increasing of third at $\theta =\frac{\pi }{3}$

let a=9

b=13

c=unknown side

Now using cos rule of triangle

$cos\theta =\frac{a^2+b^2-c^2}{2ab}$

$cos\theta =\frac{a^2+b^2}{2ab}-\frac{c^2}{2ab}$

Differentiating both sides we get

$-\sin \theta \times \frac{\mathrm{d} \theta }{\mathrm{d} t}=0-2\frac{c}{2ab}\times \frac{\mathrm{d} c}{\mathrm{d} t}$

at $\theta =\frac{\pi }{3}$

c=11.53 m

substituting values we get

$\frac{\sqrt{3}}{2}\times 0.02=\frac{11.53}{9\times 13}\times \frac{\mathrm{d} c}{\mathrm{d} t}$

$\frac{\mathrm{d} c}{\mathrm{d} t}=0.175 m/s$

8 0

3 years ago

What is the inverse of the function f(x) = 1/9x+2

Lady bird [3.3K]

Hello,

f(x) = 1/9x + 2 ⇔ y = 1/9x + 2 ⇔ 1/9x = y - 2 ⇔ x = 9(y - 2)

x = 9y - 18

⇒ f⁻¹(x) = 9x - 18

3 0

2 years ago

Read 2 more answers

10 decreased by twice a

Simora [160]

Answer:

in simplest terms 10 decreased by twice A can be written as

10-2a

Step-by-step explanation:

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3 years ago

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Svetach [21]

I think it is the first one
Hope my answer help?

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3 years ago