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Maksim231197 [3]
3 years ago
8

Lucita works at a bookstore and earns $9.50 per hour. She works 3 hours on Friday and 7 hours on Saturday. Which expression does

not represent her wages for those days?
A) 9.5(3+7)
B) 10(9.5)
C) 9.5(3)+9.5(7)
D) 9.5(3)(7)
Mathematics
1 answer:
Kryger [21]3 years ago
3 0

Answer:

D

Step-by-step explanation:

If you multiply 3 and 7 you are saying she worked 21 hours when she only worked a total of 10 hours.

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Income tax returns show that the mean income of self-employed persons in a particular year was £15,000, with a standard deviatio
DochEvi [55]

Answer:

Yes, There is significant difference.

Step-by-step explanation:

Null Hypothesis , H0 : Mean income = 15000

Alternate Hypothesis , H1 : Mean income  ≠  15000

t = (x - u) / ( s / √n)

x = sample mean = 14500 here, u = population mean = 15000 here ,             s = standard deviation =  975 here  , n = sample size

t = (14500 - 15000) / (975 / √169)

-500 / 75 = - 6.66

As  calculated t value in absolute terms is > 1.96 , ie tabulated value at 95% significance level (two sided). So we reject the null hypothesis in favor of alternate hypothesis. Hence, we state that 'Mean Income ≠  15000'

6 0
3 years ago
The travelers are adding a new room to their house. the room will be a cube with volume 3375 ft.³.they are going to put in hardw
Talja [164]

Answer:

$ 2250

Step-by-step explanation:

3375 = s³

s = ∛3375

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floor area = 225 ft²

the contractor charges $10 per ft².

therefore,  

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7 0
3 years ago
Read 2 more answers
Which expressions are equivalent to<br>-6 +49 + (-69) ?​
kiruha [24]

Answer:

-26

Step-by-step explanation:

-6+49+(-69)

43+(-69)

43-69

-26

3 0
3 years ago
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Answer:

9+10=21

Step-by-step explanation:

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