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2 years ago

Solving Linear equations 25 =x + 19

Mathematics

2 answers:

Pie2 years ago

6 0

25=x + 19
-19 -19

6=x

soldi70 [24.7K]2 years ago

3 0

Steps to solve:

25 = x + 19

~Subtract 19 to both sides

6 = x

Best of Luck!

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Vince worked 675 hours in 15 weeks. At what rate did he work in hours per week?

NNADVOKAT [17]

Answer:

45 hours a week

Step-by-step explanation:

Ok, so we know that he worked 675 hours in 15 weeks.

So all we need to do is divide the hours by the amount of weeks, which is 15:

675/15= 45

So he worked 45 hours a week!

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2 years ago

A sample of 15 commuters in Chicago showed the average of the commuting times was 33.2 minutes. If s = 8.3 minutes, find the 95%

OleMash [197]

Answer:

The 95% confidence interval of the true mean.

(29.4261 ,36.9739)

Step-by-step explanation:

Step :- (i)

Given sample size 'n' =15

sample of the mean x⁻ = 33.2

The standard deviation of the sample 'S' = 8.3

95% of confidence intervals

$(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } ,x^{-} + t_{\alpha }\frac{S}{\sqrt{n} } )$

Step:-(ii)

The degrees of freedom γ=n-1 = 15-1=14

The tabulated value t = 1.761 at 0.05 level of significance.

now substitute all possible values, we get

$(33.2 - 1.761\frac{8.3}{\sqrt{15} } ,33.2+ 1.761\frac{8}{\sqrt{15} } )$

After calculation , we get

(33.2-3.7739 , 33.2+3.7739

(29.4261 ,36.9739)

Conclusion:-

the 95% confidence interval of the true mean.

(29.4261 ,36.9739)

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3 years ago

The rule for being the nth item in a certain sequence is n(n+1)/2. what is the 4th term in this sequence ?

Lorico [155]

Answer:

a.) 4

Step-by-step explanation:

a.)4

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2 years ago

I can’t figure out what the half circle means the answer options are 163,129,149 and 186

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But since this is just a half circle, divide this by 2

That will get 39.25

Then add this to the area of the rectangle (L*W) which is 90

That will get about 129

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3 years ago

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