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3 years ago

Do 1-15 pls and who ever does it will get free v-bucks tonight

Mathematics

2 answers:

Sunny_sXe [5.5K]3 years ago

6 0

These are the answers, if it is blurry I can retake the picture but I hope this helped.

Serggg [28]3 years ago

3 0

1. 75

you would remove the parentheses and it would be 2- -73 and since a negative and a negative make a positive it makes it 2+73 which equals 75

2. 18.6

remove the parentheses which leaves you with 39-20.4 then subtract the numbers and you are left with 18.6

3. 87.086

remove the parentheses and since a negative and a negative equal a positive your sign changes 67.086+20 then add the numbers and you get 87.086

4. 41

remove the parentheses and a negative with a positive makes a negative so the problem looks like this: 60-19 then subtract the numbers and you get 41

5. 22.95

subtract the numbers 87-64.05 and you get 22.95

6. 124

remove the parentheses and since a negative and a negative makes a positive then the sign changes, then you add 93+31 and you get 124

7. 19.02

add 2+17.02 together and you get 19.02

8. -42.992

remove the parentheses and the sign inside the parentheses remain the same. 3.008-46= -42.992

9. 133.192

add 85.082 and 48.11 together and you get 133.192

10. 96.95

add 56.95 and 40 together to get 96.95

11. -20.005

flip the two numbers so that you can subtract the smaller number from the larger one so now it looks like this -(86.005-66) then subtract to get -20.005

12. 24.09

remove the parentheses and a negative with a negative make a positive so you add 20 with 4.09 and get 24.09

13. 13

subtract. 68-55= 13

14. 75.12

remove the parentheses and a negative with a negative makes a positive then add 17+58.12 to get 75.12

15. 95.001

add the two numbers together 17.001+78= 95.001

hope this helps! :3

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3 years ago

Six friends equally share a bag of popcorn. The bag contains 9 cups of popcorn. How many cups of popcorn should each friend get?

nadya68 [22]

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3 years ago

Read 2 more answers

Please help me with this quadratic equation question! I always give out 5 stars, thanks and brainliest to people that help me wi

ss7ja [257]

Answer:

$p=25,\\q=12$

Step-by-step explanation:

In $(ax+b)(cx+d)=acx^2+bcx+dax+bd$ , notice the third term of the quadratic in standard form is formed entirely by $b\cdot d$ .

Therefore, in $12x^2 - 13x - 7175 = (x-p) (qx + 287)$ :

$-p\cdot287=-7175,\\-p=\frac{-7175}{287},\\p=\fbox{$25$}$ .

Now that we found $p$ , we must find $q$ . The first term of the quadratic in standard form is formed entirely by $ax\cdot cx$ . Therefore:

$1\cdot q=12, \\q=\fbox{$12$}$ .

3 0

3 years ago

medical tests. Task Compute the requested probabilities using the contingency table. A group of 7500 individuals take part in a

uysha [10]

Probabilities are used to determine the chances of an event

The probability that a person is sick is: 0.008
The probability that a test is positive, given that the person is sick is 0.9833
The probability that a test is negative, given that the person is not sick is: 0.9899
The probability that a person is sick, given that the test is positive is: 0.4403
The probability that a person is not sick, given that the test is negative is: 0.9998
A 99% accurate test is a correct test

(a) Probability that a person is sick

From the table, we have:

$\mathbf{Sick = 59+1 = 60}$

So, the probability that a person is sick is:

$\mathbf{Pr = \frac{Sick}{Total}}$

This gives

$\mathbf{Pr = \frac{60}{7500}}$

$\mathbf{Pr = 0.008}$

The probability that a person is sick is: 0.008

(b) Probability that a test is positive, given that the person is sick

From the table, we have:

$\mathbf{Positive\ and\ Sick=59}$

So, the probability that a test is positive, given that the person is sick is:

$\mathbf{Pr = \frac{Positive\ and\ Sick}{Sick}}$

This gives

$\mathbf{Pr = \frac{59}{60}}$

$\mathbf{Pr = 0.9833}$

The probability that a test is positive, given that the person is sick is 0.9833

(c) Probability that a test is negative, given that the person is not sick

From the table, we have:

$\mathbf{Negative\ and\ Not\ Sick=7365}$

$\mathbf{Not\ Sick = 75 + 7365 = 7440}$

So, the probability that a test is negative, given that the person is not sick is:

$\mathbf{Pr = \frac{Negative\ and\ Not\ Sick}{Not\ Sick}}$

This gives

$\mathbf{Pr = \frac{7365}{7440}}$

$\mathbf{Pr = 0.9899}$

The probability that a test is negative, given that the person is not sick is: 0.9899

(d) Probability that a person is sick, given that the test is positive

From the table, we have:

$\mathbf{Positive\ and\ Sick=59}$

$\mathbf{Positive=59 + 75 = 134}$

So, the probability that a person is sick, given that the test is positive is:

$\mathbf{Pr = \frac{Positive\ and\ Sick}{Positive}}$

This gives

$\mathbf{Pr = \frac{59}{134}}$

$\mathbf{Pr = 0.4403}$

The probability that a person is sick, given that the test is positive is: 0.4403

(e) Probability that a person is not sick, given that the test is negative

From the table, we have:

$\mathbf{Negative\ and\ Not\ Sick=7365}$

$\mathbf{Negative = 1+ 7365 = 7366}$

So, the probability that a person is not sick, given that the test is negative is:

$\mathbf{Pr = \frac{Negative\ and\ Not\ Sick}{Negative}}$

This gives

$\mathbf{Pr = \frac{7365}{7366}}$

$\mathbf{Pr = 0.9998}$

The probability that a person is not sick, given that the test is negative is: 0.9998

(f) When a test is 99% accurate

The accuracy of test is the measure of its sensitivity, prevalence and specificity.

So, when a test is said to be 99% accurate, it means that the test is correct, and the result is usable; irrespective of whether the result is positive or negative.