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3 years ago

Which inequality is graphed on the coordinate plane?

Mathematics

1 answer:

bekas [8.4K]3 years ago

5 0

Answer:

Step-by-step explanation:

1:cancel out any answers with equal to since the line is dotted

2:pick any two points of your choice and work out the gradient

3:use the gradient a point on the line and an anonymous point (x,y) to get equation of a line

4:then choose a point (0,0) and substitute x with 0 in the equation to get y (in this case it's -1) which is less than 0 hope it helps

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A chemist examines 12 sedimentary samples for bromide concentraction. The mean bromide concentration for the sample date is 0.43

Umnica [9.8K]

Answer:

a) $z = 1.645$

b) Lower endpoint: 0.422cc/m³

Upper endpoint: 0.452 cc/m³

Step-by-step explanation:

Population is approximately normal, so we can find the normal confidence interval.

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$ . This is the critical value, the answer for a).

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.645*\frac{0.0325}{\sqrt{12}} = 0.015$

The lower end of the interval is the sample mean subtracted by M. So it is 0.437 - 0.015 = 0.422cc/m³.

The upper end of the interval is the sample mean added to M. So it is 0.437 + 0.015 = 0.452 cc/m³.

Lower endpoint: 0.422cc/m³

Upper endpoint: 0.452 cc/m³

4 0

3 years ago

Which of the following functions have a vertical asymptote for values of θ such that cos θ = 1? Select two answers.

valentina_108 [34]

Well costheta=1, at 0, 2pi,...
knowing this we can exclude the first two as the are not undefined anywhere.
tan is sin/cos, at 0 sin is also 0 so it becomes 0/1 which is 0, not undefined.
sec is1/cos, cos is 1, this is just 1
csc is 1/sin, sin is 0, 1/0 is undefined, meaning there will be an asymptote
cot is cos/sin, this is again 1/0, so it is also an asymptote
The last two answers are the ones you want

3 0

3 years ago

I need help with solving this problem please!!!

KATRIN_1 [288]

3 is 23 degree
8 is 157 degree

7 0

3 years ago

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F(x)=6x^2-x^2+x-5 and g(x)=0 find (f*g)(x) and (g*f)(x)

tigry1 [53]

Answer:

the answer is (-5,0)

8 0

3 years ago

Part B<br> Calculate BD. Show your work. What does this length represent with regard to ∆ABC?

Usimov [2.4K]

Answer:

4, It is the height of triangle ABC

Step-by-step explanation:

The easy way is to just count. But you can also use the Pythagorean theorem because BDC is a right triangle. First, use the distance formula to find BC. $\sqrt{(5-2)^{2} +(-2-2)^2$ =5

5^2=BD^2+DC^2

25=BD^2+9

BD=4

4 0

3 years ago

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Which inequality is graphed on the coordinate plane?​

Which inequality is graphed on the coordinate plane?