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3 years ago

A ferry is travelling at a constant speed back to the dock, as shown in the graph. Which

Mathematics

1 answer:

mario62 [17]3 years ago

7 0

Answer:

c. y = -35*x + 105

Step-by-step explanation:

Lo que demos hacer es calcular los puntos cuando x = 0 y cuando x = 3, es decir el inicio y el fin del recorrido.

Cuando x es igual 0, y = 105, por lo tanto, la función sería:

y = A*x + 105

Cuando x = 3, y = 0, por lo tanto:

0 = 3*A + 105

resolvemos para A:

3*A = -105

A = -105/3

A = -35

Por lo tanto la función es:

y = -35*x + 105

es decir, la opción c.

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A cookie factory monitored the number of broken cookies per pack yesterday.

trapecia [35]

Answer:

Confidence Interval - 2.290 < S < 2.965

Step-by-step explanation:

Complete question

A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample of 50 cookies. The mean is 23.33 and the standard deviation is 2.6. Construct a 80% confidence interval estimate of the standard deviation of the numbers of chocolate chips in all such cookies.

Solution

Given

n=50

x=23.33

s=2.6

Alpha = 1-0.80 = 0.20

X^2(a/2,n-1) = X^2(0.10, 49) = 63.17

sqrt(63.17) = 7.948

X^2(1 - a/2,n-1) = X^2(0.90, 49) = 37.69

sqrt(37.69) = 6.139

s*sqrt(n-1) = 18.2

$s\sqrt{\frac{n-1}{X^2 _{(n-1), \frac{\alpha }{2} } }$ $\leq \sigma \leq s\sqrt{\frac{n-1}{X^2 _{(n-1), 1-\frac{\alpha }{2} } }$

confidence interval:

(18.2/7.948) < S < (18.2/6.139)

2.290 < S < 2.965

8 0

2 years ago

Find the distance between the points (9,8) and (3,0)

Iteru [2.4K]

The distance will be 5

5 0

2 years ago

The balance of Bryce's accounts is $16. Jada's account is $15 overdrawn. What is the difference between their accounts balance

Mrac [35]

16 - -15 = 31 (negative - negative = positive)

hope this helps! :)

3 0

2 years ago

Total power generated by wind worldwide doubles every 3 years. In a particular year, the world wind-generating capacity was abou

NeTakaya

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2 years ago

Can anybody tell me what is a stem-and-leaf plot and a example

zhannawk [14.2K]

The following examples provide some practice with stem-and-leaf plots, as well as explaining some details of formatting, and showing how to create a "key" for your plot.

<span> Subjects in a psychological study were timed while completing a certain task. Complete a stem-and-leaf plot for the following list of times: </span>

7.6, 8.1, 9.2, 6.8, 5.9, 6.2, 6.1, 5.8, 7.3, 8.1, 8.8, 7.4, 7.7, 8.2

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5.8, 5.9, 6.1, 6.2, 6.8, 7.3, 7.4, 7.6, 7.7, 8.1, 8.1, 8.2, 8.8, 9.2

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7 0

3 years ago

Read 2 more answers