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2 years ago

I need help doing this idk how to do it, can you please explain it to? Instead of just giving me the answer

Mathematics

2 answers:

Komok [63]2 years ago

7 0

45° would be the correct answer

Misha Larkins [42]2 years ago

4 0

Answer:

A=55

B=80

C= x

So always the sum of the angles of a triangle should be 180 so

55+80+x=180

135+x=180

X= 180-135=45

Therefore, angle C = 45

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This function <br>Is it differentiable at x = 1 ?

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It is not differentiable at x=1 since the slope of the tangent line as x -> 1 from the right is 1 while the slope of the tangent line as x->1 from the left is -1

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8 months ago

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Help with #9 please?

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We're given a parabola

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We see that (-2,0) is on the line as well:

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$0 = 2(-2)+b$

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2 years ago

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Keep change flip then simplify or divide if needed

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2 years ago

Find the absolute extreme of the function on the closed interval. y=9e^xsinx , [0,pi]

Molodets [167]

For convenience sake, I will let $y=f(x)=9e^{x}\sin x$

First, we evaluate the function at the endpoints of the interval.

$f(0)=9e^{0}\sin(0)=0\\\\f(\pi)=9e^{\pi}\sin(\pi)=0$

Then, we need to find the critical points.

We can start by taking the derivative using the power rule.

$f'(x)=9e^{x} \frac{d}{dx} \sin x+9\sin x \frac{d}{dx} e^{x}=9e^{x}(\cos x+\sin x)$

Setting this equal to 0,

$9e^x (\cos x+\sin x)=0$

Since $9e^x > 0$ , we can divide both sides by $9e^x$ .

$\cos x+\sin x=0\\\\\sin x=-\cos x\\\\\tan x=-1\\\\x=\frac{3\pi}{4}$

$f\left(\frac{3\pi}{4} \right)=9e^{3\pi/4}\sin \left(\frac{3\pi}{4} \right)=\frac{9\sqrt{2}e^{3\pi/4}}{2}$

So, the absolute minimum is $\boxed{\left(\frac{3\pi}{4}, \frac{9\sqrt{2}e^{3\pi/4}}{\sqrt{2}} \right)}$ and the absolute minima are $\boxed{(0,0), (\pi, 0)}$

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1 year ago

leilani rides her bike for exercise and drinks 70 ounces of water each day in order to stay hydrated.before her morning ride, sh

Semmy [17]

Step-by-step explanation:

we need to find how much 14/70 is equal to ? over 100

100/70=1.42857142857

14x1.42857142857=20

Therefore she drinks 20/100 she drinks before she goes on a ride.

or 20%

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2 years ago