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3 years ago

PLZ HELP ME BRAINLIEST IF CORRECT

Mathematics

1 answer:

jekas [21]3 years ago

3 0

Answer:

Izi. (1,2)

Step-by-step explanation:

Just look at the graph and see where the x and y meets together when the line is being crossed

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PLZ HELP ME! THIS IS MIDDLE SCHOOL LEVEL MATH!!!!

melomori [17]

This is true! Because in order to add you have to multiply 2 to the 1/2 fraction to both numerator and denominator. That would then make the fraction 2/4and 2+3 is 5and since the denominator doesn't change, it would be 5/4.

7 0

3 years ago

Suppose scores on exams in statistics are normally distributed with an unknown population mean and a population standard deviati

Anna71 [15]

Answer:

( 67.18, 68.82)

Step-by-step explanation:

Let $\mu$ be the true (population) mean of statistics exam scores. We have a large random sample of n = 36 scores with a sample mean (sample mean score) of $\bar{x} = 68$ . We know that the population standard deviation is $\sigma = 3$ . A pivotal quantity is $(\bar{x}-\mu)/(3/\sqrt{36}) = (\bar{x}-\mu)/(3/6) = (68-\mu)/(1/2)$ which is approximately normally distributed and $P(-z_{0.05}\leq(68-\mu)/(1/2)\leq z_{0.05}) = 0.90$ where $-z_{0.05} =-1.6449$ , and so, $P(-1.6449\leq(68-\mu)/(1/2)\leq 1.6449) = 0.90$ . Therefore the 90% confidence interval is (68-(1/2)(1.6449), 68+(1/2)(1.6449)), i.e., ( 67.18, 68.82)

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3 years ago

What is the length of rt

MAXImum [283]

Answer:

Step-by-step explanation:

6 0

3 years ago

There are 28 student desks in Ms. Johnson’s. Each desk measures 26.17 inches long. If you were to line up all the desks end-to-e

trasher [3.6K]

Answer:

732.76

Step-by-step explanation:

There are 28 desks and each is 26.17. The word "each" signifies multiplication. Formula - 26.17 x 28 or ; inches x desks

Hope this helps :)

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3 years ago

Expressions that have the same value

grin007 [14]

If you need an equivalent expression just make a simple problem like 30+4=4+30 then add all the complicated stuff needed to complete the problem <span />

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3 years ago