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Dovator [93]
2 years ago
9

1. 6(4x+1)=782. 2(x+10)=60Solve for x​

Mathematics
1 answer:
postnew [5]2 years ago
7 0

Answer:

1. x= -3

2. x= 20

Step-by-step explanation:

sorry if this is wrong,

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The average monthly cell phone bill was reported to be $50.07 by the U.S. Wireless Industry. Random Sampling of a large cell pho
zalisa [80]

Answer:

The null and alternative hypotheses are:

H_{0}:\mu= 50.07

H_{a}:\mu>50.07

Under the null hypothesis, the test statistic is:

t=\frac{\bar{x}-\mu}{\frac{s}{\sqrt{n}} }

Where:

\bar{x} = 52.86 is the sample mean

s=7.0132 is the sample standard deviation

n=10 is the sample size

\therefore t=\frac{52.86-50.07}{\frac{7.0132}{\sqrt{10}} }    

          =1.26

Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:

t_{critical}=1.833

Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.


4 0
3 years ago
Help? please? ill give brainliest :)
lina2011 [118]

Answer:

Two 50 bottles

Step-by-step explanation:

because the 50 bottles is more cheaper than buying a n 80 ml bottle,

it's just a waste of money.

3 0
2 years ago
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An experiment has 12 possible outcomes, all equally likely. An event can occur in 6 ways. Find the probability that the event oc
Nataliya [291]

Probability of an event= number of ways an event can occur / total number of possible outcomes.

Probability = 6/12 = 0.5

8 0
2 years ago
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Diego measured the number of cups of water in 15 bottles of various sizes. He made this line plot to show how many of each size
Hunter-Best [27]

Answer:

A plot would be very useful to solve the question.

Step-by-step explanation:

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2 years ago
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Steve has 8 biscuits in a tin. There are 5 digestive and 3 chocolate biscuits. Steve takes two biscuits at random from the tin.
Fudgin [204]

Answer:

5/7

Step-by-step explanation:

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3 years ago
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