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3 years ago

Is height always a statistical subject

Mathematics

1 answer:

Maru [420]3 years ago

8 0

Answer:

It Is!

Step-by-step explanation:

"For example, “How old am I?” is not a statistical question, but “How old are the students in my school?” is a statistical question because one anticipates variability in students' ages."

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Write a quadratic equation with the given roots. Write the equation in the form of ax^2+bx+c=0 where a b and c are integers

Bas_tet [7]

You haven't provided the required roots, but I can tell you how to do this kind of exercises in general.

If the $x^2$ coefficient is 1, i.e. the equation is written like $x^2+bx+c=0$ , then you can say the following about the coefficients b and c:

$b$ is the opposite of the sum of the roots
$c$ is the multiplication of the roots.

So, for example, if we want an equation whose roots are 4 and -2, we have:

$4+(-2) = 4-2 = 2 \implies b = -2$
$4 \cdot (-2) = -8 \implies c = -8$

So, the equation is $x^2-2x-8=0$

If your roots are rational, you can work like this: suppose you want an equation with roots 3/4 and 1/2. You have:

$\dfrac{3}{4}+\dfrac{1}{2} = \dfrac{3}{4}+\dfrac{2}{4} = \dfrac{5}{4} \implies b = -\dfrac{5}{4}$
$\dfrac{3}{4} \cdot \dfrac{1}{2} = \dfrac{3}{8} \implies c = \dfrac{3}{8}$

And so the equation is

$x^2 - \dfrac{5}{4} + \dfrac{3}{8} = 0$

In order to have integer coefficients, you can multiply both sides of the equation by 8:

$8x^2 - 10 + 3 = 0$

5 0

3 years ago

Simplify the given expression below: 2 divided by the quantity of 2 plus 5i

kodGreya [7K]

<span>Remove the imaginary from the denominator.
</span> $\frac{2}{2 + 5i}$
$( \frac{2}{2 + 5i} )( \frac{2 - 5i}{2 - 5i} )$
$\frac{2(2 - 5i)}{(2 + 5i)(2 - 5i)}$
$\frac{4 - 10i}{4 - 10i + 10i - 25 i^{2} }$ $i^{2} = -1$
$\frac{4 - 10i}{4 + 25}$
$\frac{4 - 10i}{29}$ <span>

</span>

8 0

4 years ago

Write a number less than 50 that has at least six factors.

pentagon [3]

Answer:

the number can be 12

1 x 12 = 12

2 x 6 = 12

3 x 4 = 12

5 0

3 years ago

Please need help on this

ser-zykov [4K]

Answer: In my answer I got 9 because the formula to find the area it would be A=1/2b*h

Step-by-step explanation: How would you do this?

Well we know that the base equals 6 we have heighth so we would have to do 1.5*6 and that would give us 9 but if we round it would be 10 because 9 is closer to 10 than it is to 0.

thanks :)

4 0

4 years ago

Mrs.Traynor's class is taking a field trip to the zoo.The trip cost $26 for each student.There are 22 students in her class.

kow [346]

So they said each is $26 and students is 22
like you need to do multiply 26*22=572
so she get $572 for 22 students.

3 0

3 years ago