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2 years ago

Some one plz help me

Mathematics

2 answers:

Schach [20]2 years ago

7 0

Use pythagoras to find DF
Df=sqr(10^2-8^2)
DF=6
SinE= opposite/hypotenuse
SinE=6/10=3/5

Deffense [45]2 years ago

5 0

Answer:

Given:

- angle: E

- opposite-leg : 3

- adjacent - leg: 4

- hypotenuse: 5

sin(E) = opposite-leg / hypotenuse = 3 / 5

Answer: 3 / 5

Step-by-step explanation:

Brainliest?

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3 years ago

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Find three consecutive ocid integers such that the sum of the largest and twice the smallest is 25.

tresset_1 [31]

Answer:

Step-by-step explanation:

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2 years ago

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Savatey [412]

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2 years ago

According to USA Today, customers are not settling for automobiles straight off the production lines. As an example, those who

MrMuchimi

Answer: $(24980.25,\ 25419.75)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : $n= 179$ , which is a large sample , so we apply z-test .

Sample mean : $\overline{x}=20200+5000=25200$

Standard deviation : $\sigma= 1500$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Now, a confidence interval at the 95% level of confidence will be :-

$25200\pm(1.96)\dfrac{1500}{\sqrt{179}}\\\\\approx25200\pm219.75\\\\=(25200-219.75,\ 25200+219.75)\\\\=(24980.25,\ 25419.75)$

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3 years ago

Working together, two identical water pumps can fill a pull in 10 hours. Determine whether quantities (number of pumps and hours

vovikov84 [41]

Answer:

The number of pumps and hours) vary inversely.

The constant of variation is 20.

Step-by-step explanation:

Let x be number of pumps and y be number of hours.

We have been given that working together, two identical water pumps can fill a pull in 10 hours. This means while working alone the pumps will take 2 times as much time to fill the tank.

As we increase number of pumps (x), number of hours (y) is decreasing and as we decrease x our y is increasing, therefore, number of pumps (x) and hours (y) vary inversely.

Since we know that an inversely proportion equation is in form: $y=\frac{k}{x}$ , where, k is constant of variation.

Upon substituting our given values in above equation we will get,

$10=\frac{k}{2}$

Upon multiplying both sides of our equation by 2 we will get,

$2*10=2*\frac{k}{2}$

$20=k$

Therefore, the constant of variation is 20.

3 0

3 years ago