Given: AC and BC bisect each other at o Prove: ABCD is a parallelogram

Mathematics

1 answer:

belka [17]3 years ago

3 0

I think I’m on the same one aha

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I need help with both questions, you can answer either exercise #2 or #4 or both if you want to.

KATRIN_1 [288]

For 2a, we plug 3 in to get (4*3+3)/(3^2-7)=15/2. Since 2 is a prime number and 15 is not divisible by 2, this is simplest form. For b, using PEMDAS, division goes before addition or subtraction and 3/3^3 would therefore be done and you could not add 4*3 beforehand (or subtract 7).

For 4a, we plug it in to get sqrt(25-(-3)^2)=sqrt(25-9)=sqrt(16)=4

For b, since 13^2=169 and 25-169 is negative, we cannot find the square root due to that nothing squared is negative.

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When you add a positive integer and a negative integer, how can you tell whether the sum will be positive or negative?

Marysya12 [62]

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3 years ago

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Which rectangle if translated 3 units left and 10 units down and then reflected over the line x = -5 will result in rectangle E?

aev [14]

Answer:

Rectangle C

Step-by-step explanation:

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What is the relationship between 7 and —7?

Alex73 [517]

Answer: absolute value

Step-by-step explanation:

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If the distribution is really N ( 5.43 , 0.54 ) , N(5.43,0.54), what proportion of observations would be less than 5.05 ? 5.05?

Ipatiy [6.2K]

Answer:

$P(X$

And we can use the following excel code to find the answer: "=NORM.DIST(-0.704,0,1,TRUE)"

Step-by-step explanation:

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 of interest for a population, and for this case we know the distribution for X is given by:

$X \sim N(5.43,0.54)$