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anastassius [24]

3 years ago

14

Calculate the average speed in (km/hr) of charlie who runs to the store 4km away in 30 minutes? How much will Charlie run in two

hours?

1 answer:

vekshin13 years ago

6 0

If he runs 4km in 30 minutes, then that would mean he runs at about 8km/hour. So in 2 hours, he would run 16km.

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Help me from 3 through 8

skad [1K]

Answer:

3)x=−9 and x=4

4)x=−12 and x=−5

5)x=8 and x=14

6)x=−7 and x=3

7)x=-1 2/3 and x = 1/4

8)x=2/5

Step-by-step explanation:

Hope this helps

7 0

2 years ago

The ratio of red ribbons to green ribbons is 4 to 6.If these are total of 32 red ribbons, then how many green ribbons are there?

den301095 [7]

Answer:

48 green

Step-by-step explanation:

red : green

4 : 6

We want 32 red ribbons

Multiply each side by 8

red : green

4*8 : 6*8

32 : 48

4 0

3 years ago

Read 2 more answers

To rent a certain meeting room, a college charges a reservation fee of $37 and an additional fee of $6.70 per hour. the chemistr

mojhsa [17]

37 + 6.70t < 90.60
6.70t < 90.60 - 37
6.70t < 53.6
t < 53.6 / 6.70
t < 8 <=== they could rent the meeting room for less then 8 hrs

3 0

2 years ago

A sociologist recently conducted a survey of senior citizens who have net worths too high to qualify for Medicaid but have no pr

hjlf

Answer:

a) $s= 9.74$

D. 9.74

b) $Median= 74$

B. 74

Step-by-step explanation:

Part a

We have the following dataset given:

69 74 75 62 70 93 64 69 61 88 67 77 87 90 66 91 77 63 82 82 71 74 76 65 83

We can begin calculating the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = 75.04$

Now we can calculate the sample deviation with the following formula:

$s =\sqrt{\frac{\sum_{i=1}^n (X_i-\bar X)^2}{n-1}}$

And after replace we got:

$s= 9.74$

Part b

For this case we need to sort the value on increasing way:

[1] 61 62 63 64 65 66 67 69 69 70 71 74 74 75 76 77 77 82 82 83 87 88 90 91 93

And the median would be the value in the position 13 and we got:

$Median= 74$

6 0

2 years ago

destiny sells pencil cases for $5 each and mechanical pencils for $2 each at the school supply store. she sells p pencil cases a

Andrew [12]

Answer:

Step-by-step explanation:

5p + 2(p + 4) .......because pencil cases (p) sell for 5 bucks a piece....and mechanical pencils (p + 4), sell for 2 bucks a piece. She is basically selling 4 more mechanical pencils then she is pencil cases.

8 0

3 years ago