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astraxan [27]
2 years ago
5

Whats the sum of 7,439.31 + 89.5? include work too please.

Mathematics
2 answers:
dsp732 years ago
5 0

Answer:

7528.81.............

LUCKY_DIMON [66]2 years ago
3 0

Answer:

7,528.81

Step-by-step explanation:

  1 1  

7,439.31

+   <u>89.5</u>

7,528.81

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95=4x-8+3x-18
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add 24 both sides
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divide both sides by 7
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sub back

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5 0
3 years ago
The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher
ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

5 = 1.96(\dfrac{47}{\sqrt{n}} )\\\\\sqrt{n} = \dfrac{47\times 1.96}{5}\\\\n = 339.443776\\\Rightarrow n \approx 340

Thus, the correct answer is

Option D) 340

7 0
3 years ago
What would X is less than or equal to negative 7 look like as a graph
Anastaziya [24]

Answer:

Place a dot on 7 and do < underlined

8 0
3 years ago
Five-sevenths of a number is -35. what is the number?
White raven [17]
So lets write this equation out.  Let x be that number we are trying to find. 

So five-sevenths is a fraction that is written like this 

5/7 

when you see the word "of" that means multiplication 

so we can write the full equation. 

(5/7)x = -35 

now we can solve 

Multiply both sides by 7 

5x = -245

now divide by 5 
and we get 

x = -49

3 0
3 years ago
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