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34kurt
4 years ago
5

Find the mean of the set of numbers: 15, 13, 12, 12, 20

Mathematics
2 answers:
Butoxors [25]4 years ago
6 0
The mean of the data set is 14.4
Wewaii [24]4 years ago
6 0
Add all the numbers together and divide them by the number of numbers you added to get the mean (in other words the average)
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I can’t figure out how to use the zeros in the polynomial. Please explain
Temka [501]

Answer:

a) P (x) = (x + 3) (x-1) (x-4)

b) P (x) = (2x + 5) (5x - 4) (x-6)

c) P (x) = (x-3) (x-1) (x-4) (x + 1) ^ 2

Step-by-step explanation:

<u>For the question a *</u> you need to find a polynomial of degree 3 with zeros in -3, 1 and 4.

This means that the polynomial P(x) must be zero when x = -3, x = 1 and x = 4.

Then write the polynomial in factored form.

P (x) = (x + 3) (x-1) (x-4)

Note that this polynomial has degree 3 and is zero at x = -3, x = 1 and x = 4.

<u>For question b, do the same procedure</u>.

Degree: 3

Zeros: -5/2, 4/5, 6.

The factors are

x = -\frac{5}{2}\\\\x +\frac{5}{2} = 0\\\\(2x +5) = 0

---------------------------------------

x =\frac{4}{5}\\\\x-\frac{4}{5} = 0\\\\(5x-4) = 0

--------------------------------------

x = 6\\\\(x-6) = 0

--------------------------------------

P (x) = (2x + 5) (5x - 4) (x-6)

<u>Finally for the question c we have</u>

Degree: 5

Zeros: -3, 1, 4, -1

Multiplicity 2 in -1

x = -3\\\\(x-3) = 0

--------------------------------------

x = 1\\\\(x-1) = 0

--------------------------------------

x = 4\\\\(x-4) = 0

----------------------------------------

x = -1\\\\(x + 1) = 0

-----------------------------------------

P (x) = (x-3) (x-1) (x-4) (x + 1) ^ 2

8 0
3 years ago
Write a proportion for each of the diagrams below and solve for the missing value.
Sphinxa [80]

Answer:

y=6

Step-by-step explanation:

\frac{4}{8} =\frac{3}{y}

4y=24

y=6

6 0
2 years ago
#24 Help needed :P thanks
alukav5142 [94]
Have you got your answer yet?

7 0
3 years ago
Which graph represents y = RootIndex 3 StartRoot x minus 5 EndRoot?
Anika [276]

Answer:d

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A total of $5000 is invested: part at 7 % and the remainder at 15 %. How much is invested at each rate if
Aneli [31]


0.07 (5000-x) + 0.15x= 480
Solve for x
350-0.07x+0.15x=480
0.08x=130
X=1625 invested at 15%
(5000-1625)=3375 invested at 7%



6 0
2 years ago
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