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kati45 [8]
2 years ago
13

Select the correct locations on the graph. select the lines that represent functions.​

Mathematics
2 answers:
sleet_krkn [62]2 years ago
7 0

Answer:

right side, bottom. curve

Step-by-step explanation:

ladessa [460]2 years ago
4 0

Answer:

the one that

goes /

Step-by-step explanation:

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The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and finds that the sample mean i
ki77a [65]

Answer:

The 95% confidence interval for mean compressive strength is:

3237.3\leq \mu\leq 3282.5

Step-by-step explanation:

We have a sample of n=12 specimens, with sample mean=3259.9 and sample standard deviation = 35.57.

We know the population is normally distributed.

For a 95% confidence interval and df=n-1=11, the t-statistic is t=2.201.

Then, the CI can be expressed as:

M-t*s/\sqrt{N}\leq \mu\leq M+t*s/\sqrt{N}\\\\3259.9-2.201*35.57/\sqrt{12}\leq \mu\leq 3259.9+2.201*35.57/\sqrt{12}\\\\ 3259.9-22.6\leq \mu\leq 3259.9+22.6\\\\3237.3\leq \mu\leq 3282.5

6 0
3 years ago
Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x)
seraphim [82]

Answer:

Video result for Let F(x) = 2x2 + x - 3 and g(x) = x - 1. f(x) g(x) Find and state its domain. Answers: X - 1; domain is the set of all real numbers (x-1)/(2x + 3) ; domain is the set of all real numbers except-(3/2) 2x + 3; domain is the set of all real numbers except 1​6:39

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Domain and range of quadratic functions (video)

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Step-by-step explanation:

3 0
2 years ago
K/5 = 9/15 plz help mee
Molodets [167]

Answer:

k = 3

Step-by-step explanation:

Reduce the right side of the equation by 3 to get 3/5.  Since both denominators now are even you should get 3 which is k as your answer.

5 0
2 years ago
Help. Please open powerpoint and help me!
GREYUIT [131]

Answer:

<u>3</u><u>0</u><u>.</u><u>4</u><u>%</u><u> </u>

1000 at £1.10

1000 x 1.10 = £1100

35% of 1000 is given away

1000 - 35% = 1000 - 350 = 650 left

35% of £1100 = £385, subtract to get £715 pounds worth of pins left

650 are left, with 385 pounds lost

60% of 650 = 390 pins sold at £3 each

40% of 650 = 260 sold at £5 for 2

3 x 390 = £1170 made from the first lot

260/2 = 130 x 5 = £650 made from the second lot

£1170 + £650 = £1820 from sales

Sales - cost to make - losses (giveaways) = profit value

1820 - 1100 - 385 = 335 pounds of profit

To find the gross profit margin, we take the profit, and find what percentage of the production cost it is.

335 is about 30.45% of 1100

30.45%, which is 30.4% to 1 decimal place.

The user is not responsible for any errors and all care should be taken to validate answer by self before submission.

7 0
3 years ago
If tan theta = 10/13 and cos theta &gt; 0 then sin2theta is what ?
svetoff [14.1K]

sin2\alpha  = \frac{260}{269}

<u>Step-by-step explanation:</u>

We have , Tan\alpha  = \frac{Perpendicular}{Base} = \frac{10}{13},

We know that sin\alpha  = \frac{Perpendicular}{Hypotenuse} = \frac{Perpendicular}{\sqrt[2]{(Perpendicualr)^{2} + (Base)^{2})} }

Substituting values of P & B , sin\alpha  = \frac{10}{\sqrt{10^{2} + 13^{2}} }  = \frac{10}{\sqrt{269} }

Now , sin2\alpha  = 2sin\alpha cos\alpha  = 2sin\alpha \sqrt{1 - (sin\alpha)^{2} }

⇒sin2\alpha  = \frac{10}{\sqrt{269} } ×\sqrt{1 - (\frac{10}{\sqrt{269} })^{2} }×2

⇒ sin2\alpha  = \frac{20}{\sqrt{269} }( \sqrt{\frac{269 - 100}{269} }  )

⇒sin2\alpha  = \frac{20}{\sqrt{269} }( \sqrt{\frac{169 }{269} }  )

⇒sin2\alpha  = \frac{260}{\sqrt{269} }( \sqrt{\frac{1}{269} }  )

⇒sin2\alpha  = \frac{260}{269}

6 0
3 years ago
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