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2 years ago

Can someone please help me answer these questions

Mathematics

1 answer:

Fittoniya [83]2 years ago

7 0

Answer:

sue had the busiest day of all

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Find the value of the variable and BC, if B is between A and C. AB = 5x, BC = 3x-1, AC = 47

schepotkina [342]

Answer:

Step-by-step explanation:

AC = AB + BC

Since we know what each variable equals, we can write out the equation as shown:

47 = 5x + 3x - 1

Combining like terms:

47 = 8x - 1

Add 1 on both sides:

48 = 8x

Divide 8 on both sides:

X = 6

Now that we know what X equals, we can solve BC.

BC = 3(6) - 1

BC = 18 - 1

BC = 17

Therefore BC = 17.

4 0

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)

8 0

3 years ago

When you two integers with sign, you and keep the

sweet [91]

Wait what sign do you mean

7 0

3 years ago

Area of rectangle 12ft 6ft

Brilliant_brown [7]

12ft×6ft= area of 72ft

8 0

3 years ago

What is the ratio of daises to all the flowers in the vase?

ddd [48]

Answer: Do you have the original ration so we can simplify it then??

Step-by-step explanation:

3 0

2 years ago