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3 years ago

Wat do I do I don't know

Mathematics

1 answer:

pshichka [43]3 years ago

3 0

I can't see all the triangles, but basically, it is asking you to write down triangles that are congruent with each other.

The marks in the corner of the triangle indicate that the angles of that triangle are congruent to the other triangle.

So,

Triangle NOP= Triangle NQP

Make sure that the points align with each other, otherwise you could be saying that two different triangles are congruent to each other.

N= N O=Q P=P

I hope this cleared some confusion!
~kaikers

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In a whole 40% is 1380 what does the other 60% equal

Karolina [17]

If you divide 2380 by 4, it will give you 10% of the whole:

1380/4=345

Then you can times 345 by 6 To find the 60%:

345*6=2070

PS Please check my calculations with a calculator as I worked these out in my head.

5 0

3 years ago

If the filling equipment is functioning properly what is the probability that the volume of oil in a randomly selected barrel wi

Sophie [7]

Answer:

$P(X>55.4)=P(\frac{X-\mu}{\sigma}>\frac{55.4-\mu}{\sigma})=P(Z>\frac{55.4-55}{0.5})=P(Z>0.8)$

$P(Z>0.8)=1-P(Z\leq 0.8)$

$P(Z>0.8)=1-0.788=0.212$

Step-by-step explanation:

Assuming this previous info : "Trucks carry barrels of crude oil from a port in Texas to a distributer in New Mexico on long trailers. Filling equipment is used to fill the barrels with the oil. When functioning properly, the actual volume of oil loaded into each barrel by the filling equipment at the port is approximately normally distributed with a mean of 55 gallons and a standard deviation of 0.5 gallons. If the mean is greater than 55.4 gallons, the filling mechanism is overfilling."

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the amount filling of a population, and for this case we know the distribution for X is given by:

$X \sim N(55,0.5)$

Where $\mu=55$ and $\sigma=0.5$

We are interested on this probability

$P(X>55.4)$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(X>55.4)=P(\frac{X-\mu}{\sigma}>\frac{55.4-\mu}{\sigma})=P(Z>\frac{55.4-55}{0.5})=P(Z>0.8)$

And we can find this probability using the complement rule:

$P(Z>0.8)=1-P(Z\leq 0.8)$

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(Z>0.8)=1-0.788=0.212$

8 0

3 years ago

My real estate agent told me that my house appreciated in value over the last three years. In other words, it has gone from bein

bixtya [17]

Answer:

Step-by-step explanation:

102.500÷×+÷110,000

4 0

3 years ago

The diagram shows a circle of radius 1 contained in a square. If the area of the circle equals x% of the area of the square, the

11111nata11111 [884]

Answer:

Area of square with a side of 2r = 2(1) = 2 = 2^2 = 4

Area of circle = pi ( 1)^2 = pi

x = pi / 4 ≈ .79 = 79%

7 0

3 years ago

What is the value of y in the following system?<br> Y= 3x-5<br> 6x + 3y= 15

nalin [4]

X = 2
y = 1

You can get this by replacing the y in the second equation with the 3x - 5 from the first. Then solve for x. Once you have that value, you can solve for y.

7 0

3 years ago