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3 years ago

Which of the following expressions is equal to -3x^2-27?

Mathematics

1 answer:

Iteru [2.4K]3 years ago

3 0

Answer:

$\sqrt{2}$

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From a practice assignment:<br>solve the following differential equation given initial conditions

hodyreva [135]

If $y' = e^y \sin(x)$ and $y(-\pi)=0$ , separate variables in the differential equation to get

$e^{-y} \, dy = \sin(x) \, dx$

Integrate both sides:

$\displaystyle \int e^{-y} \, dy = \int \sin(x) \, dx \implies -e^{-y} = -\cos(x) + C$

Use the initial condition to solve for $C$ :

$-e^{-0} = -\cos(-\pi) + C \implies -1 = 1 + C \implies C = -2$

Then the particular solution to the initial value problem is

$-e^{-y} = -\cos(x) - 2 \implies e^{-y} = \cos(x) + 2$

(A)

4 0

2 years ago

Someone explain how this is answer C? Big points!

Snowcat [4.5K]

Answer:

C. x = 15 * sin 18°

Step-by-step explanation:

sin A = Opposite / Hypotenuse

sin 18° = x / 15

x = 15 * sin 18°

4 0

3 years ago

5/8 + -3/4 i don’t know this

Deffense [45]

Answer:

-0.125

Step-by-step explanation:

6 0

3 years ago

What is the difference of the polynomials?

Fiesta28 [93]

Answer: wt-

Step-by-step explanation: hehe

8 0

3 years ago

2x-y<-3

timama [110]

Answer:

y > 2x + 3

Step-by-step explanation:

Okay, first let's simplify the equation by understanding the form.

y = mx + b is the form.

Currently we have 2x - y < -3, So we can subtract 2x on both sides to get

-y < -2x - 3

Let's multiply each term by -1 to get

y < 2x + 3, but wait! We have to flip the sign!

The answer is :

y > 2x + 3

5 0

2 years ago