4 years ago

Which expression gives the distance between the points (5. 1) and (9, -6)?

Mathematics

1 answer:

tresset_1 [31]4 years ago

8 0

D^2=(x2-x1)^2+(y2-y1)^2

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Write a polynomial function with the real zeros -3, 0, and 3.

suter [353]

$f(x)=x(x-3)(x+3)$

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2 years ago

I need help with this question :-/

Karolina [17]

3s = 72 (Multiply 8 both side).

s = 24 (divide by 3 both side)

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4 years ago

in a population distribution a score of x=28 corresponds to z=-1.00 and a score of x=34 what is the mean and standard deviation

irakobra [83]

$x=28\implies z=\dfrac{28-\mu}\sigma\implies \mu-\sigma=28$

$x=34\implies z=\dfrac{34-\mu}\sigma\implies \mu+\sigma z=34$

We need the exact value of $z$ to find a proper solution, but a general one can still be found. Subtracting the first equation from the second gives

$(\mu+\sigma z)-(\mu-\sigma)=34-28\implies (z+1)\sigma=6\implies \sigma=\dfrac6{z+1}$

Plug this into either equation and you get

$\mu-\dfrac6{z+1}=28\implies \mu=28+\dfrac6{z+1}$

(It's guaranteed that $z\neq-1$ in this case because that already corresponds to $x=28$ .)

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4 years ago

Find the difference between the polynomials: –3x+x^3–2x^2 and 4x^3–2x^2–4x

Andrews [41]

x-3x^3

Step-by-step explanation:

just pretend they are in parentheses and open them

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4 years ago