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kirill [66]
2 years ago
10

What does inverse operation mean

Mathematics
2 answers:
nordsb [41]2 years ago
4 0
It is basically the opposite of a math thingy.  For example if you have an adding equation thing, you would have to subtract.

They basically undo each other.  Hope this helps!
sesenic [268]2 years ago
3 0
It is basically the thing that will reverse a certain operation

the operations are add, subtract, multiply divide

the inverses are add and subtract, multiply divide

so
when you add, to reverse it, you must subtract
when you multiply, you have to divide to reverse it
and vice versa
when you subtract, you must add to reverse it
when you divide, you must mulitply to reverse it
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When doing blood testing for a viral infection, the procedure can be made more efficient and less expensive by combining partial
Serjik [45]

Answer:

0.1694 = 16.94% probability of a positive result for three samples combined into one mixture.

Step-by-step explanation:

For each test, there are only two possible outcomes. Either it is positive, or it is negative. The probability of a test being positive or negative is independent of any other test, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

The probability of an individual blood sample testing positive for the virus is 0.06.

This means that p = 0.06

If samples from three people are combined and the mixture tests negative, we know that all three individual samples are negative. Find the probability of a positive result for three samples combined into one mixture.

It will be positive if at least one of the tests is positive, that is:

P(X \geq 1) = 1 - P(X = 0)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{3,0}.(0.06)^{0}.(0.94)^{3} = 0.8306

Then

P(X \geq 1) = 1 - P(X = 0) = 1 - 0.8306 = 0.1694

0.1694 = 16.94% probability of a positive result for three samples combined into one mixture.

8 0
2 years ago
Each meal at a dinner is $10 . 5 friends ate . Then there was 9% tax . What is the final total ?
harina [27]

Answer:

54.50

Step-by-step explanation:

10 * 5 + 9%

50 + 9% (4.50) = 54.50

7 0
3 years ago
Read 2 more answers
Mrs. Ramiriz is making pies to sell at the local farmer’s market. It costs her $5 to make each pie, plus a one-time cost of $30
belka [17]
5p + 30 = 12p <== ur equation
5p - 12p = -30
-7p = -30
p = -30/-7
p = 4 2/7 pies to break even
4 0
3 years ago
Richard Lens receives a 3.5% commission for selling cleaning supplies. What is his commission on sales of $122,591?
LekaFEV [45]

Answer:

$4,290.69

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

- To find the commission, just convert the percentage into a decimal (divide by 100) and multiply it by the sales.

3.5% = 0.035

122,591 x 0.035 = <em>$4,290.69</em>

5 0
2 years ago
Read 2 more answers
An 8ft length of crown molding costs $12. How much will it cost to buy 40 ft of crown molding?​
zzz [600]

Answer:

$60

Step-by-step explanation:

12/8 = x/40

40(12/8) = x

60 = x

8 0
2 years ago
Read 2 more answers
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