Alexis drove 1200 miles in 30 h. What was her rate of travel in miles per hour?

Mathematics

2 answers:

NARA [144]3 years ago

6 0

40 miles per hour is the answer you are lookin g for

Damm [24]3 years ago

3 0

40 mph

First you have 1200/30. You are trying to get to 1 hour, so in order to get 30 to one, you must divide 30 by 30 and 1200 by thirty as well. You get 40 miles per hour.

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Kruka [31]

First, recall that

$\sin(-\theta)=-\sin\theta$

So if $\sin(-\theta)=\dfrac15$ , then $\sin\theta=-\dfrac15$ .

Second,

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}$

We know that $\tan\theta>0$ and $\sin\theta$ , which means we should also have $\cos\theta$ .

Third,

$\sin^2\theta+\cos^2\theta=1\implies\cos\theta=\pm\sqrt{1-\sin^2\theta}$

but as we've already shown, we need to have $\cos\theta$ , so we pick the negative root.

Finally,

$\tan\theta=\dfrac{\sin\theta}{\cos\theta}\iff\dfrac6{\sqrt{12}}=\dfrac{-\frac15}{\cos\theta}\implies\cos\theta=-\dfrac1{5\sqrt3}$

Unfortunately, none of the given answers match, so perhaps I've misunderstood one of the given conditions... In any case, this answer should tell you everything you need to know to find the right solution from the given options.

6 0

3 years ago

PLS DO TODAY :) 50 points and brainleist.

inysia [295]

Answer:

I had to repost my answer because i got deleted from some reason

Step-by-step explanation:

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6 0

2 years ago

Find a degree 3 polynomial with real coefficients having zeros 4 and 2i and a lead coefficient of 1. Write P

iren2701 [21]