How do i find the answer to this problem
Blank divide by 9=45

Answer:

4.

Step-by-step explanation:

First work out the mean:

Mean = (2 + 5 + 6 + 8 + 14) / 5

= 35/5 = 7.

Now subtract the mean form each of the values:

2 - 7 = -5

5 - 7 = -2

6 - 7 = -1

8 - 7 = 1

7 - 14 = -7.

The squares of these are 25, 4, 1, 1, 49

Their sum = 25 + 4 + 1 + 1 + 49 = 80

Now divide this by 5  = 16.

Standard deviation is  √16 = 4.

Answer:

The hourly rate Bruce charges is, $33.75

Step-by-step explanation:

Direct Variation states two variables that can be expressed by an equation in which one variable is equal to a constant times the other, or we can say that if one variable changes then the other changes in proportion to the other.

i.e or

y = kx where k is the constant.

Let x be the number of hours and y be the charges.

He charges $ 135 for 4 hours, by using direct variation;

⇒

Solve for k:

per hour

Now, for 6 hours he charges $ 202.50, by using direct variation.

⇒

Now, solve for above k: we have

per hour.

Therefore, the hourly rate Bruce charges to rent a snowmobile, k is, $ 33.75

Answer: Hourly rate of rent a snowmobile is $ 33.75.

Step-by-step explanation:

Since we have given that

Amount Bruce charges for 4 hours = $135

Amount Bruce charges for 6 hours = $ 202.50

Since there is direct variation, as with the increase in hours the cost will also increase.

So, it will be written like this :

But we need to find the hourly rate which will be

Hence, hourly rate of rent a snowmobile is $ 33.75.

Let the number of boys be x

Let the number of girls be x + 4

(x + 4) + x = 28

x + x + 4 = 28

2x + 4 =28

2x = 28 - 4 →  2x = 24  → x = 24 / 2  →  x = 12

The number of boys is 12, so the girls are 12 + 4 = 16

Ratio of girls to boys → 16 : 12 → 4 : 3

Ratio of girls to boys is 4:3