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Delvig [45]
3 years ago
11

Shania has 12 coins in her pocket the coins have5 pennies and 7 dimes Shania randomly selects one from her pocket and without re

placing it selects another coin from her pocket what is the probability that both coins are pennies
(help please)
Mathematics
2 answers:
aev [14]3 years ago
8 0

Answer:

probability is 3/95

Step-by-step explanation:

salantis [7]3 years ago
4 0

Answer:

The probability is 3/95

Step-by-step explanation:

The probability that you will pick two pennies is

4

20

×

3

19

=

12

380

=  

3

95

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DochEvi [55]

Answer:

(-3/2x+1) + (3/x-1)

Step-by-step explanation:

Dont put the answer in parenthesis, I just did that to seprate it so it was easier to read. If you need it to be put in word form for it to be easier for you to understand, its "negative three divided by two x plus one, plus 3 divided by x minus 1"

First, rewrite the expression as 3x+6/2x^2+x-2x-1

Then, factor the expression, 3x+6/x*(2x+1)-(2x+1) (*=multiply)

Then, write a new fraction for each factor in the denominator, then write a new fraction, 3x+6/(2x+1)*(x-1) to (A)/2x+1 + B/x-1)

Then write terms in the numerators, for now we will use A and B.

Now we set the sum of the fractions equal to the original fraction.

3x+6/(2x+1)*(x-1) = A)/2x+1 + B/x-1).

Then reorder and group the terms, giving you 3x+6=(A+2B)x+(-A+B).

Now equate the coefficiants, {6= -A+B, 3= A+2B

Then substitute back, (A, B)=(-3, 3)

Now finally, just rewrite the fraction. (-3/2x+1) + (3/x-1)

Hope this helps! Sorry its kind of long.

6 0
3 years ago
1. Given the following relation, determine the inverse relation.
gayaneshka [121]

Answer:

1. a

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Step-by-step explanation:

1. Since there is one value of y for every value of x in (−1,0),(−4,5),(3,2),(−3,5), this relation is a function.

2. To find the inverse, interchange the variables and solve for y.

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