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sweet-ann [11.9K]

3 years ago

8

⚠️⚠️PLEASE HELP!!!!!⚠️⚠️

1 answer:

deff fn [24]3 years ago

7 0

Answer: B : The high temperature in Memphis decreased steadily.

Step-by-step explanation:

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Marty says he would rather -$5 than $0 do you agree with marty

borishaifa [10]

Answer:

I dont Agree because Your Just Losing 5 dollars Rather Than Losing nothing

Step-by-step explanation:

8 0

3 years ago

Hi, help with question 18 please. thanks

Vadim26 [7]

Answer:

See Below.

Step-by-step explanation:

We are given the equation:

$\displaystyle y^2 = 1 + \sin x$

And we want to prove that:

$\displaystyle 2y\frac{d^2y}{dx^2} + 2\left(\frac{dy}{dx}\right) ^2 + y^2 = 1$

Find the first derivative by taking the derivative of both sides with respect to <em>x: </em>

<em /> $\displaystyle 2y \frac{dy}{dx} = \cos x$ <em />

Divide both sides by 2<em>y: </em>

<h3><em /> $\displaystyle \frac{dy}{dx} = \frac{\cos x}{2y}$ <em /></h3>

<em />

Find the second derivative using the quotient rule:

$\displaystyle \begin{aligned} \frac{d^2y}{dx^2} &= \frac{(\cos x)'(2y) - (\cos x)(2y)'}{(2y)^2}\\ \\ &= \frac{-2y\sin x-2\cos x \dfrac{dy}{dx}}{4y^2} \\ \\ &= -\frac{y\sin x + \cos x\left(\dfrac{\cos x}{2y}\right)}{2y^2} \\ \\ &= -\frac{2y^2\sin x+\cos ^2 x}{4y^3}\end{aligned}$

Substitute:

$\displaystyle 2y\left(-\frac{2y^2\sin x+\cos ^2 x}{4y^3}\right) + 2\left(\frac{\cos x}{2y}\right)^2 +y^2 = 1$

Simplify:

$\displaystyle \frac{-2y^2\sin x-\cos ^2x}{2y^2} + \frac{\cos ^2 x}{2y^2} + y^2 = 1$

Combine fractions:

$\displaystyle \frac{\left(-2y^2\sin x -\cos^2 x\right)+\left(\cos ^2 x\right)}{2y^2} + y^2 = 1$

Simplify:

$\displaystyle \frac{-2y^2\sin x }{2y^2} + y^2 = 1$

Cancel:

$\displaystyle -\sin x + y^2 = 1$

Substitute:

$-\sin x + \left( 1 + \sin x\right) =1$

Simplify. Hence:

$1\stackrel{\checkmark}{=}1$

Q.E.D.

8 0

3 years ago

The manufacturer of a certain engine treatment claims that if you add their product to your engine, it will be protected from e

Oksana_A [137]

Answer: $H_0:\mu\geq33$

$H_a:\mu$

Step-by-step explanation:

Let $\mu$ be the average number of hours a person drive without adding the product.

Given claim : An infomercial claims that a woman drove 33 hours without oil.

i.e. $\mu\geq33$

It is known that the null hypothesis always contains equal sign and alternative hypothesis is just opposite of the null hypothesis.

Thus the null and alternative hypothesis for the given situation will be :-

$H_0:\mu\geq33$

$H_a:\mu$

3 0

3 years ago

Read 2 more answers

Leon created a scale drawing of the school library in his art class. In the scale drawing, the length of the library is 13 inche

Monica [59]

Answer:

It should be A

Step-by-step explanation:

Hope this helps (:

5 0

3 years ago

HELP MEEEEE!!!!!!!!!!!!!!!!!!!!!!! I WILL GIVE BRAINILEST TO THE RIGHT ONE

blondinia [14]

Answer:

m + 8

Step-by-step explanation:

you start with the original number of marbles, m, and you ADD 8 more to the group.

Original number (m) + 8 more

M = 8

8 0

3 years ago

Read 2 more answers