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3 years ago

Please, i need help by tomorrow or I’m going to fail geometry. It’s for 20 points

Mathematics

1 answer:

drek231 [11]3 years ago

7 0

Step-by-step explanation:

the first statement and reason is usually found in what's given at the beginning.

1.a 1. given

the last one is what they want you to prove (also found under what was given)

4. g ( the symbol just means congruent)

supplementary means if I take how far the angle opens up and add it to the other angle I will get a straight line or 180°

the middle letter tells me the corner (vertex) and like opening a book you can see how much the angle opens up. it is a definition for supplementary angles

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In 2000 pizza costs 7.50 and in 2015 it costs 9.00 what is the percentage of change in the cost of the pizza

padilas [110]

Percentage change = difference/original x 100

(9.00-7.50)/7.50 x 100 = 2.50/7.50 x 100
= 1/3 x 100
= 33.3% increase

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3 years ago

Asking for a friend please help

Dmitriy789 [7]

Answer:

=1/15

Step-by-step explanation:

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3 years ago

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Question 18(Multiple Choice Worth 1 points) (05.02 MC) The figure shows a parallelogram inside a rectangle outline: 1 foot B ---

lesya692 [45]

Answer:

1/9

Step-by-step explanation:

You find the area of the rectangle first (1/2 by 1/3)

then find the area excluding the parallelogram (the two triangles outside, which would be 1/6 by 1/3 since both are of the same side measurement)

(sorry if this is hard for you to understand by the way)

Then subtract the answer from step 2 from step 1 and voila, you get your answer

7 0

3 years ago

Mrs.rucker and mrs. overall are given 66 calculators to share equally between their classroom. Which of the following expression

mojhsa [17]

Answer:

66/2

Step-by-step explanation:

Here, you have 2 people, and a total of 66 calculators.

If you want to split it evenly, you just have to divide 66 by 2.

Hope I helped :)

4 0

3 years ago

A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation

melamori03 [73]

Answer:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The point estimate of the population mean is $\hat \mu = \bar X In order to calculate the critical value [tex]t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=64-1=63$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

$\bar X=1400$ represent the sample mean

$\mu$ population mean (variable of interest)

s=240 represent the sample standard deviation

n=64 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The point estimate of the population mean is $\hat \mu = \bar X In order to calculate the critical value [tex]t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=64-1=63$

5 0

4 years ago