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Naddika [18.5K]
3 years ago
11

I don't know how to do this it is hard

Mathematics
1 answer:
Solnce55 [7]3 years ago
3 0
(-4) means that it would be +4
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Last week, Riley worked 7.5 hours per day for 3 days and earned a total of $306.45.
maria [59]

Answer:

13,62$

Step-by-step explanation:

The total hours Riley worked last week: 7.5*3= 22.5 (hours)

Riley's hourly rate of pay: 306.45/ 22.5= 13.62$

8 0
2 years ago
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Plz help me because I don’t no it<br><br> 2345 ➗ 550
babymother [125]

Answer:

4.26363636364 or this fraction 4 and 6590909090/25000000000

Step-by-step explanation:

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3 years ago
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What is the factored form of x2x-2?
Sergeeva-Olga [200]

Answer:

2(x-1)(x+1)

Step-by-step explanation:

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6 0
3 years ago
Suppose the poll in the previous question was conducted by email, and those conducting the survey are concerned about the possib
mr_godi [17]

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Throw this sample out and start over again with a better sampling method

Step-by-step explanation:

Biased sampling leads wrong results, since the sample doesn't represent the population which is aimed to be surveyed. Higher/lower confidence level or t distribution cannot correct it.

Confidence level gives the probability of rejecting null hypothesis while it is true. And t-interval is used when the sample size is small or population standard deviation is unknown.

Before choosing confidence level or type of the statistic to infer results, one must follow random sampling not biased.

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3 years ago
I do not know 28y + 12x
vivado [14]

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280 + 120 = 400

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the intercept to both is 0

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