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musickatia [10]
3 years ago
9

Can someone please help

Mathematics
1 answer:
choli [55]3 years ago
6 0
2nd one, where u get this from?
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Solve for X 3(-2x-1)=2(x+5)
fredd [130]
U need to use the distributive property ok? The u have to add or subtract the number on both sides bring it down and the you have to divide
5 0
3 years ago
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a particular test correctly identifies those with a certain serious disease 94% of the time and correctly diagnoses those withou
Elodia [21]
This item can be solved by the probability theorem called Bayes' theorem which states that the probability of event A occurring given event B is equal to,
                            P(A/B) = P(A)P(B/A) / P(B)
where P(B/A) is the probability that the test will yield positive if the person has the disease. P(A) is the probability will be present in any particular person which is equal to 0.04. 

P(B) is the probability of positive result irrespective of whether the disease is present of not is calculated below.
                   P(B) = (0.94)x (0.04) + (0.06)(0.96) = 0.0952

Now, solving for P(A/B)
                            P(A/B) = (0.94)(0.04) / 0.0952 = 0.039
Thus, the answer is approximately 4%. 
3 0
3 years ago
(3,7)(2,6) Find the equation for the line that falls through the two ordered pairs
Alexxandr [17]

Answer: The equation for the two given points is y=x+b


Step-by-step explanation:

Step 1. First find the slope: 6-7/2-3 = -1/-1=1. The slope is just 1, or x. So for now, the equation is y=x+b

Step 2. We must find the y-intercept, or B. We can plug in any points to find b. Let's use (2, 6) (but you can use (3, 7) too, it doesn't matter) Plug 2 in for x, since 2 represents x, and then do the same for y. ---> 6=2+b.

Step 3. Simplify. 6=2+b. 6-2=2-2+b ---> b=4. Subtract both sides by 2 to get B.

The equation for the two given points is y=x+b

Hope this helps.

7 0
3 years ago
Nancy's 50 meter freestyle swim time was 2i.004 seconds. Betty's 50 meter freestyle swim time was 27.949 seconds. What was the d
xxMikexx [17]
6.945 seconds was the difference between Nancy's and Betty's swim times.

27.949 - 21.004 = 6.945
8 0
3 years ago
A recent survey estimated that 19 percent of all people living in a certain region regularly use sunscreen when going outdoors.
Alla [95]

Answer: The conclusion is that all samples of the same size between 18% to 20% indicate that people living in a certain region use sunscreen regularly when going outdoors.

Explanation: Given percentage from the recent survey, the possible range is calculated as below:

All possible range : (19% ± 1% ) = (18%, 20%)

3 0
3 years ago
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