Well, try
to find the solution for this…
-0.2x⁵ + 0.04x⁴ - 0.0625x³ - 2x² + 0.3x + 4=0
<span>The answer
is 1.33. How would you figure it out without a computer?
In order to find all the roots of a polynome with a grade lower than 2, we need
to know at least 1 root (this polynome has grade 5). We can try with the
divisors of the constant (4 is the constant), which are: 1,-1,2,-2,4 and -4.
But no, none of them verifies the equation! So it will be of hard to find a
root. That’s because there are too many fractions, and a fraction can come from
a variety of divisions. It’s even more difficult to find a root when there are
irrational numbers among the roots (such as the square root of 2, or half a pi,
or e). So, if we don’t know any of the roots, we can’t work with the Ruffini
rule.</span>
So in this
case I suggest to put this in a graphic software:
y=-0.2x⁵ + 0.04x⁴ - 0.0625x³ - 2x² + 0.3x + 4
And there
you have the plot. Then you click in “roots” and it will tell you the point: (1.33,0).
So that’s how you know 1.33 is the answer.
The probability would be 6/16 or 37.5% because there are 16 coins in total and 6 of them are worth more than 5 cents. :)
Answer:
pick the yellow one
Step-by-step explanation:
its yellow
Answer:
15 people must pay 45 unit currency each
Explanation:
Assume that the number of people is x and that the price per person is y.
We are given that the cost per person varies inversely with the number of people.
This means that as the number of people (x) increases, the cost per person (y) decreases and vice versa
This can be translated into the following equation:
y = k / x
where k is the constant of proportionality.
Now, we need to get k.
We are given that:
for number of people (x) = 5, the charge per person (y) is 135.
Substitute with this in the above equation to get k as follows:
y = k / x
135 = k / 5
k = 135 * 5 = 675
The equation now became:
y = 675 / x
Finally, we want to get the cost per person (y) when the number of people (x) is 15.
All we have to do is substitute in the above equation to get the y as follows:
y = 675 / x
y = 675 / 15
y = 45
This means that, for a group of 15 people, each one will pay 45 unit currency
Hope this helps :)