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kkurt [141]
3 years ago
14

- 13" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Sav [38]3 years ago
5 0

You need to isolate x.


71 - 5x = 9x - 13

Add 13 to both sides.

84 - 5x = 9x

Add 5x to both sides.

84 = 14x

Divide both sides by 14.

6 = x


<h3>The answer is x = 6.</h3>
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The principal of a large high school wants to know if students spend more than 1 hour doing homework per night, on average. To i
MrRissso [65]

Answer:

If we define the random variable X ="time spend by the students doign homework"

And we want to tes t is students spend more than 1 hour doing homework per night, on average (alternative hypothesis), so then the system of hypothesis for this case are:

Null hypothesis: \mu \leq 1

Alternative hypothesis: \mu >1

And they wnat to use a sample size of n = 100 and a significance level of 0.05

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Solution to the problem

If we define the random variable X ="time spend by the students doign homework"

And we want to tes t is students spend more than 1 hour doing homework per night, on average (alternative hypothesis), so then the system of hypothesis for this case are:

Null hypothesis: \mu \leq 1

Alternative hypothesis: \mu >1

And they wnat to use a sample size of n = 100 and a significance level of 0.05

7 0
3 years ago
Use the rule y=-x+7to fill in the blank (1,y) is on the graph,then y=
Anon25 [30]
Y = 6 because - ( 1 ) + 7 = 6
6 0
3 years ago
Read 2 more answers
The cost of a taxi ride is represented by the function c(m)=2m+4, where m is the number of miles traveled. What is the cost per
galina1969 [7]

Answer:

cost per mile = $2.

Step-by-step explanation:

Given the cost function, c(m) = 2m + 4,

Where the m represents the number of miles traveled, and $2 is the cost per mile of the cab. The $4 represents the flat rate, a set fee, or the initial value.

Therefore, the cost per mile of the cab is $2.  

3 0
3 years ago
2. Lindsay, who is the youngest member of the softball team at King's Fork High School, is 7
Andrei [34K]
Lindsay’s age = 7 - 1/3n
4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Csf%20-9%288-2h%29" id="TexFormula1" title="\sf -9(8-2h)" alt="\sf -9(8-2h)" align="absmiddl
coldgirl [10]

Answer:

- 9(8 - 2h)  \\ by \: distributive \: property \\  =  - 9 \times 8 - ( - 9) \times ( - 2h) \\  =    - 72 - 18h

3 0
2 years ago
Read 2 more answers
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