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insens350 [35]
3 years ago
8

It takes you 4 hours to driving 180 miles .Explain how to use mental math to find your average speed .Then, Explain how your met

hod is related to the formula d=rt
Mathematics
1 answer:
Doss [256]3 years ago
5 0
To find your average speed, divide 180 by 4 which is 45.
Formula:
Plug the number into the equation
180 is d (distance)
4 is t (time
So it would be 180=r•4
1) get r by itself so divide 4 to both sides
2) 180/4 = r
3) 45 = r
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The mean of a set of numbers is 8, and the mode is 9.
ryzh [129]
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Therefore your answer is C
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3 years ago
A set of sweater prices are normally distributed with a mean of 58 dollars and a standard deviation of 5 dollars. What proportio
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3 years ago
Find the four rational numbers and irrational numbers between 2/5 and 5/6
Savatey [412]
The four?

Of course there are an infinite number of rationals between any two different real numbers, as well as an even bigger infinite number of irrationals.

The average will be between the numbers:

\frac 1 2 (\frac 2 5 + \frac 5 6) = \dfrac{37}{60}

That's a lot of work to get a number in between.  We can just see

\frac 1 2
is between the two numbers.

The mediant, or freshman addition, will always be in between:

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2/5=.4 and 5/6 is about .83, so

.6 = \frac{6}{10}

is in between as is .7, .41, .530940394 and as many rationals as we care to generate.

To get irrationals we could just add a teeny irrational to the ones we just generated, like \frac{6}{10} + \frac{\pi}{100}

We could just change that denominator a bit and get as many as we like.

But let's get some square roots.  The geometric mean will be between

\sqrt{ \dfrac 2 5 \cdot \dfrac 5 6 } = \dfrac{1}{\sqrt{3}}


That's the tangent from one of trig's biggest cliches, but I digress.  It's in between.

While we're on trig cliches, 

\dfrac{1}{\sqrt{2}}

is in between as well.

Keeping with the trig theme, also in between are

\dfrac{\pi} 6

and

\dfrac{\pi}{4}


the angles associated with the some of the above trig function values.

We could obviously go on as long as we cared to.



7 0
4 years ago
For the function f(x) = –2(x + 3)2 − 1, identify the vertex, domain, and range.
gregori [183]
F(x) = -2(x + 3)^2 - 1
vertex = (-3, -1)
domain is all real number values of x and
range is all real numbers values of y less than or equal to -1.
5 0
3 years ago
Read 2 more answers
A rectangle has a perimeter of 100 kilometers and a base of 47 kilometers. What is the height?
klio [65]
The answer to this is 3 bc 47*2=94
100-94=6
6/2=3
3 0
3 years ago
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