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PIT_PIT [208]
3 years ago
15

Factor and simplify: (a^2+2a)^2-2(a^2+2a)-3

Mathematics
1 answer:
Alinara [238K]3 years ago
8 0
The answer is a^4+4a^3+2a^2-4a-3
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20=x/3-8 what is x please help
malfutka [58]
20=x/3-8


28=3x


3x/3 = 28/3


X= 28/3
6 0
3 years ago
Please explain your answer. Thank you!!
Ad libitum [116K]

Answer:

(A) 180

Step-by-step explanation:

We have to treat those player selections as independent events, since one doesn't influence the other (the fact you chose Joe as a guard, shouldn't have an influence on who'll pick as center, unless there's bad blood between some players... but that's a whole other story).

So, how many ways to pick 2 guards from a selection of 4?  The order doesn't seem to matter here, since they don't specify for example that Joe can only play on the left side).  So, it's a pure combination calculation:

C(4,2) = \frac{4!}{2! * (4 - 2)!} = \frac{24}{2 * 2} = 6

C(4,2) = 6.

How many ways to pick the 2 forwards from a group of 5?  Using the same calculation, we get:

C(5,2) = 10.

And of course, the coach has 3 ways to pick a center player from 3.

Then we multiply the possible ways to pick guards, forwards and center...

6 * 10 * 3 = 180 ways.

7 0
3 years ago
I need help me need to match i am getting confuse.
gregori [183]

Answer:

1 A= pi 21^2

2 C=pi 21

3 A= pi 10.5^2

4 C= 2pi 10.5

Step-by-step explanation:

7 0
3 years ago
What is the image of the point (8,-6) after a rotation of 180° counterclockwise
astraxan [27]

Answer:

(-8,6)

Step-by-step explanation:

rotating 180 degrees: x and y coordinates change signs

7 0
3 years ago
A particular beach is eroding at a rate of 4 centimeters per year. A realtor converts this rate to millimeters per day. Which ex
mr_godi [17]
First convert 4 cms to mms  by multiplying by 10 
then divide this by  number of days in a year (365)

so R = 10*4  / 365

        =  0.109589  mm / day
4 0
3 years ago
Read 2 more answers
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