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2 years ago

Please help for exam review Find 165% of 80

Mathematics

2 answers:

ehidna [41]2 years ago

7 0

You answer is going to be 132

pashok25 [27]2 years ago

4 0

Answer:

132

Step-by-step explanation:

First turn your precent to a decimal, by dividing by 100

165 ÷ 100 = 1.65

Then multiply your decimal by you amount

1.65 × 80 = 132

Then there is your answer! Hope that helped.

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Solving separable differential equation DY over DX equals xy+3x-y-3/xy-2x+4y-8

Ivanshal [37]

It looks like the differential equation is

$\dfrac{dy}{dx} = \dfrac{xy + 3x - y - 3}{xy - 2x + 4y - 8}$

Factorize the right side by grouping.

$xy + 3x - y - 3 = x (y + 3) - (y + 3) = (x - 1) (y + 3)$

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Now we can separate variables as

$\dfrac{dy}{dx} = \dfrac{(x-1)(y+3)}{(x+4)(y-2)} \implies \dfrac{y-2}{y+3} \, dy = \dfrac{x-1}{x+4} \, dx$

Integrate both sides.

$\displaystyle \int \frac{y-2}{y+3} \, dy = \int \frac{x-1}{x+4} \, dx$

$\displaystyle \int \left(1 - \frac5{y+3}\right) \, dy = \int \left(1 - \frac5{x + 4}\right) \, dx$

$\implies \boxed{y - 5 \ln|y + 3| = x - 5 \ln|x + 4| + C}$

You could go on to solve for $y$ explicitly as a function of $x$ , but that involves a special function called the "product logarithm" or "Lambert W" function, which is probably beyond your scope.

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1 year ago

Calculate the distance travelled by a bus in 2 hours which moves with the velocity of 22 meter per second

erastovalidia [21]

Answer:

Step-by-step explanation:

<u>distance = velocity x time</u>

where: time = 2 hrs. x 3600 sec / 1 hr

= 7200 secs

velocity = 22 m/s

plugin values into the formula:

distance = 22 m/s x 7200 sec.

= 158,400 m. or 158.4 km

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2 years ago

Help please I don’t understand

Juli2301 [7.4K]

Could we get a little bit more in detail

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2 years ago