Which expression is equivalent to

Lyme disease is an inflammatory disease that results in a skin rash and flulike symptoms. It is transmitted through the bite of

neonofarm [45]

Answer:

Step-by-step explanation:

Let cases of Lyme disease = x

x = 2, 1, 3, 4, 5, 1, 2, 1, 6, 5, 4, 1

$\sum x = 35$

$\sum x^2 = 139$

y = 0, 1, 2, 1, 3, 5, 2, 3, 3, 3, 1, 0

$\sum y = 24$

$\sum y^2 = 72$

$\sum xy = 55$

$S_{xx} = \sum x^2 - (\sum x)^2/n\\S_{xx} = 139 - 35^2/12\\S_{xx} = 36.92\\S_{yy} = \sum y^2 - (\sum y)^2/n\\S_{yy} = 72 - 24^2/12\\S_{yy} = 24$

$S_{xy} = \sum xy - ( \sum x \sum y)/n\\S_{xy} = 55 - (35*24)/12\\S_{xy} = -15$

b) Linear correlation between Lyme disease and drowning deaths.

$r = \frac{S_{xy}}{\sqrt{S_{xx}S_{yy}} }$

r = -15/ √(24*36.92)

r = -0.504

3 0

3 years ago

At Thanksgiving, Mrs. Jones overcooked the turkey so all but 5 of it had to be thrown away. The 8 people at dinner that

VashaNatasha [74]

The question has inconsistent or incomplete data, so I'm filling the holes with key data.

Answer:

Every people at dinner received one-tenth of the original turkey= 0.1

Step-by-step explanation:

Proportions

If some fraction a/b of a whole total M is to be computed and later removed, we proceed as follows

* Compute the portion to be removed as a/b*M

* Subtract it from the total quantity: M-a/b*M=M(1-a/b)

I'm assuming 1/5 of the turkey was lost due to overcooking. It means that (1-1/5) of the turkey remained for dinner, that is, 4/5 of the turkey.

Each people at dinner received the same amount of the remaining, so we must divide 4/5 by 8, to get 4/40, or 1/10. It means that every people at dinner received one-tenth of the original turkey

3 0

3 years ago

Read 2 more answers

Neil and Nancy are married with two children at home and a mortgage. Neil's net pay per year is $56,000 and Nancy doesn't have a

jok3333 [9.3K]

Answer:

their current cash flow is negative since their expenses are higher than their income:

monthly net income = $56,000 / 12 = $4,667
monthly expenses = $1,500 + $3,500 = $5,000
monthly cash flow = ($333)

they have 3 options:

Option 1 (which I personally dislike) is that Neil contributes $4,000 less per year to his retirement account in order to balance their net income and expenses. The problem is that once he retires, his income will be much lower.
Option 2 is that they lower their expenses a little bit, only enough to balance their cash flows.
Option 3 is that Nancy gets a part time job, maybe a couple of hours per day which will allow her to earn money that can be used to cover some expenses.

Personally I believe that option 2 is the best, but if they definitely cannot lower their monthly expenses, then option 3 would probably fit them.

7 0

3 years ago

Please help! If it's not any of the multiple choice please tell me

Vesnalui [34]

Its not any of them. The answer is 48. She did it completely wrong
-4/9(-9/4)=x/100(-9/4)

the next step would be:
-1=-9x/432
Then the answer would be 48 since you would multiply by 432 and divide by -9

6 0

3 years ago

A new car has a sticker price of $26,450, while the invoice price paid on it was $20,450. What is the percentage markup?

MrRa [10]

Answer: The correct answer is Choice C 29.3%.

To find the percent change, we place the amount of change over the original amount.

The change is: 26450 - 20450 = 6000

Now, we can write our fraction and change it to a percent.

6000 / 20450 x 100 = 29.3%

3 0

4 years ago

Read 2 more answers