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3 years ago

9 hours _____ minutes

Mathematics

2 answers:

lions [1.4K]3 years ago

6 0

9 hours is equal to 540 minutes if thats what your asking

LiRa [457]3 years ago

5 0

9 hours is 540 minutes

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Find x so that QS ‖ PT. PQ = 15, QR = 3, RS = 8, ST = x – 3

zzz [600]

Answer:

x=12

Step-by-step explanation:

oPQ= 15 and ST= x-3 and segment PQ and segment ST are congrunt so 15-3=12 and that makes x 12

6 0

3 years ago

Find the general solution to 1/x dy/dx - 2y/x^2 = x cos x, y(pi) = pi^2

Finger [1]

Answer:

$\frac{y}{x^2}=\sin x+\pi$

Step-by-step explanation:

Consider linear differential equation $\frac{\mathrm{d} y}{\mathrm{d} x}+yp(x)=q(x)$

It's solution is of form $y\,I.F=\int I.F\,q(x)\,dx$ where I.F is integrating factor given by $I.F=e^{\int p(x)\,dx}$ .

Given: $\frac{1}{x}\frac{\mathrm{d} y}{\mathrm{d} x}-\frac{2y}{x^2}=x\cos x$

We can write this equation as $\frac{\mathrm{d} y}{\mathrm{d} x}-\frac{2y}{x}=x^2\cos x$

On comparing this equation with $\frac{\mathrm{d} y}{\mathrm{d} x}+yp(x)=q(x)$ , we get $p(x)=\frac{-2}{x}\,\,,\,\,q(x)=x^2\cos x$

I.F = $e^{\int p(x)\,dx}=e^{\int \frac{-2}{x}\,dx}=e^{-2\ln x}=e^{\ln x^{-2}}=\frac{1}{x^2}$ { formula used: $\ln a^b=b\ln a$ }

we get solution as follows:

$\frac{y}{x^2}=\int \frac{1}{x^2}x^2\cos x\,dx\\\frac{y}{x^2}=\int \cos x\,dx\\\\\frac{y}{x^2}=\sin x+C$

{ formula used: $\int \cos x\,dx=\sin x$ }

Applying condition: $y(\pi)=\pi^2$

$\frac{y}{x^2}=\sin x+C\\\frac{\pi^2}{\pi}=\sin\pi+C\\\pi=C$

So, we get solution as :

$\frac{y}{x^2}=\sin x+\pi$

4 0

4 years ago

30, ______, 19, 13 1/2 find the missing number

Anika [276]

It's decreasing by 5 1/2 each time, so:
<u><em>24 1/2, or 24.5</em></u>

4 0

3 years ago

Answers to 5 and 6 please need help please!

Tresset [83]

My friend says 5 is 60 and 6 is b.

8 0

3 years ago

There are six orange marbles, 2 red marbles, 3 white marbles, and 4 green marbles in a bag. Once a marble is drawn, it is replac

bogdanovich [222]

Answer:

2.) 2 orange marble in a raw

Step-by-step explanation:

because there are more orange marble than other colours

8 0

3 years ago