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xxTIMURxx [149]
3 years ago
7

Perform the indicated operation. 8/a - 6/a + 7/a

Mathematics
1 answer:
Jlenok [28]3 years ago
3 0

Answer:

9/a

Step-by-step explanation:

8/a - 6/a + 7/a

Since the denominators are the same, we can add the numerators

8-6+7 =9

Then put it over the common denominator a

9/a

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Smooth Operator
eduard

Answer:1,240 minutes or 20 1/3 hours.

Step-by-step explanation: there are 31 days in january so 40 x 31=2140

8 0
2 years ago
(1-(-3)/9-(-3)) solve
podryga [215]

Answer:

4.33333333333

Step-by-step explanation:

4 0
3 years ago
Can someone please help me factor 6x^2 - 9x+42
frutty [35]

Answer:

3(2x^2-3x+14)

Step-by-step explanation:

6x^2-9x+42

All three terms have a common factor of 3

3(2x^2-3x+14)

Now let's focus on 2x^2-3x+14 and bring down the factor 3 later

so a=2

b=-3

c=14

Let's try to find two factors for ac that multiply to be a*c and add up to be b.

ac=28

b=-3

-----

ac=7(4)=14(2)=8(2)

Even if I made these pairs with both negatives nothing would give me -3

So you can only go as far as 3(2x^2-3x+14)

Here is another thing to help you if you have ax^2+bx+c and b^2-4ac<0 then it can't be factored (over reals)

6 0
3 years ago
Read 2 more answers
Let x and y be independent each uniformly distributed on {1,2,...,n} find p(x &lt; y )
bulgar [2K]
If we draw the contingency table of x (vertical) against y (horiz.), we have a square.
For n=4, we have   (legend:  < : x<y   = : x=y   > : x>y

y      1  2  3  4
x
1      = <  <  <
2      > =  <  < 
3      >  >  = <
4      >  >  >  =

We see that there are n(n-1)/2 cases of x<y out of n^2.
Therefore, 
p(x<y)=n(n-1)/(2n^2)=(n-1)/(2n)

However, if the sample space is continuous, it will be simply p(x<y)=1/2.

8 0
2 years ago
PLEASEE HELP ANYONE
Grace [21]
1- Leave the 1st case empty

2- Write on the 1st row each element of the trinomial in each case

3-Write on the 1st column in each case each of the element of the binomial

              ║         y²                   -3y                 9
----------- ║-----------------------------------------------------
y             ║        y³                   -3y²                9y
----------- ║---------------------------------------------------
3             ║      3y²                  -9y                  27
------------║----------------------------------------------------
   TOTAL║(y³+3y²) +(-3y²-9y)   +  ( 9y+27)


If you add the Total you will get: (A)  Y³+27


6 0
2 years ago
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