Hey guys need help show work if you can thanks

Mathematics

1 answer:

Serjik [45]3 years ago

6 0

9) Adding up the numbers in the graph result in a total of 250 students. Adding 58 and 41 gives 99, so 99*100/250%= 39.6%

10) x^2-14x+49 can be factored as (x-7)^2

11) (1,3) is the answer because all of the other order pairs already have a domain value of it. For example, (7,0) is not possible to be part of the function because (7,2) already exists.

12) x^2-6x+9=12+9

(x-3)^2=21

To find the constant in question 12, first divide the middle term by 2, then square it. (assuming a=1 in the form of ax^2+bx+c)

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You are assigned 32 math exercises for homework. You complete 87.5 of these before dinner. How many do you have left to do after

VARVARA [1.3K]

Answer:

Step by step:

This is if the question is saying you completed 87.5% of the exercises. Otherwise, I don't know what it is asking.

87.5% of 32=28

32-28=4

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3 years ago

Lengths of full-term babies in the US are Normally distributed with a mean length of 20.5 inches and a standard deviation of 0.9

mash [69]

Answer:

66.48% of full-term babies are between 19 and 21 inches long at birth

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean length of 20.5 inches and a standard deviation of 0.90 inches.

This means that $\mu = 20.5, \sigma = 0.9$