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4 years ago

6th grade help please math

Mathematics

2 answers:

adelina 88 [10]4 years ago

6 0

Answer:

In order: 1. 12 cookies per hour; 2. 80 miles per hour.

Step-by-step explanation:

To do this, you just divide the first value by the second. I will show work for both equations. Refer to it if needed at any time.

Question 1.

36 cookies divided by 3 hours equals 12 cph (cookies per hour)

Question 2.

240 miles divided by 3 hours equals 80 mph (self-explanatory)

Hope this helps.

givi [52]4 years ago

4 0

1) 12 cookies per hour
2) train travels 80 miles per hour

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5x - 8y = 20<br> what are x and y? :)

Alex_Xolod [135]

Answer:

x could be 10

y could be 5

those are some possible answers.

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2 years ago

Read 2 more answers

A couple book a cruise to Alaska that promises to refund 100 per day of rain on the seven day cruise up to a maximum of 300. The

zubka84 [21]

Answer:

the variance of the refund payment to the couple = 9463.394

Step-by-step explanation:

Given that :

A couple book a cruise to Alaska that promises to refund 100 per day of rain on the seven day cruise up to a maximum of 300.

It is possible that the couple won't be able to refund up 100 per day or more than 100 per day.

SO; let assume that the refund payment happens to be 0, 100,200, 300

Let X be the total refund payment on the seven day cruise.

We can say X = 0, if there is no rain on all 7 days.

$P(X = 0) = _nC_x * P^x * (1 - P)n-x$

$P(X = 0) = _7C_o * 0.2^0 * (1-0.2)^{7-0$

$P(X = 0) =1 * 1* (1-0.2)^{7$

$P(X = 0) =(0.8)^{7$

$P(X = 0) =0.2097152$

If it rains on any one day; then X = 100

$P(X = 100) = _nC_x * P^x * (1 - P)n-x$

$P(X = 100) = _7C_1 * 0.2^1 * (1-0.2)^{7-1$

$P(X = 0) =7 * 0.2* (1-0.2)^{6$

$P(X = 100) =7* 0.2* (0.8)^{6$

$P(X = 100) =0.3670016$

if it rains on any two day ; then X = 200

$P(X = 200) = _nC_x * P^x * (1 - P)n-x$

$P(X = 200) = _7C_2 * 0.2^2 * (1-0.2)^{7-2$

$P(X = 200) = 21 * 0.2^2 * (0.8)^{5$

$P(X = 200) = 0.2752512$

if it rains on any three day or more than that ; then X = 300

$P(X \ge 300) = 1 - P(X < 300) \\ \\ P(X \ge 300) = 1 - [P(X = 0) + P(X = 100) + P(X = 200)] \\ \\ P(X \ge 300) = 1 - [0.2097152 + 0.3670016 + 0.2752512] \\ \\ P(X \ge 300) = 0.148032$

Now; we have our probability distribution function as:

P(X = 0) = 0.2097152

P(X = 100) = 0.3670016

P(X = 200) = 0.2752512

P(X = 300) = 0.148032

In order to determine the variance of the refund payment to the couple; we use the formula:

variance of the refund payment to the couple $[Var X] =E [X^2] - (E [X])^2$

where;

$E[X^2] = \sum x^2 \times p \\ \\ E[X^2] = 0^2 * 0.2097152 + 100^2 * 0.3670016 + 200^2 * 0.2752512 + 300^2 * 0.148032 \\ \\ E[X^2] = 0 + 3670.016 + 11010.048+ 13322.88 \\ \\ E[X^2] =28002.944$

$(E [X]) = \sum x * p\\ \\ (E [X]) = 0 * 0.2097152 + 100 * 0.3670016 + 200 * 0.2752512 + 300 * 0.148032 \\ \\ (E [X]) = 0 + 36.70016 + 55.05024 + 44.4096\\ \\ (E [X]) = 136.16 \\ \\ (E [X])^2 = 136.16^2 \\ \\ (E [X])^2 = 18539.55$

NOW;

the variance of the refund payment to the couple = 28002.944 - 18539.55

the variance of the refund payment to the couple = 9463.394

7 0

3 years ago

I only need help on 3, 4 , and D) <br> please help i need it really bad.

Anettt [7]

Answer:

1) 12

2) Yes, there could be 16 people

3) 1/2 of one segment which is 1 block or 2 skinny blocks

4) 1/12

5) 1 of 4 people -> This means that each person gets 1.5/6 pieces which is greater than 0.66/12 piece

1.5/6 = 3/12 which is greater than 0.66/12 piece

Step-by-step explanation:

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3 years ago

Anna paid $4 for renting a video game for 4 days. Which graph shows the relationship between the costs of renting a video game f

Andreas93 [3]

She paid $ 4 for renting a video game for 4 days...that means she paid $ 1 per day.

A horizontal axis is labeled days, a vertical axis is labeled cost of rental.
(x,y)...x is gonna be ur days and y is gonna be ur cost of rental

ur equation is gonna be y = x

points are plotted (1,1) , (2,2), (3,3)

^^ this is the graph u use ...graph B

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4 years ago

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Yakvenalex [24]

Answer:

Step-by-step explanation:

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3 years ago