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nirvana33 [79]
3 years ago
8

Amanda's first four test scores are 77, 95, 84, and 69. What does Amanda need to score on the next test to have at least an 82 a

verage?
A) 85 or greater
B) 90 or greater
C) greater than 85
D) greater than 92
Mathematics
1 answer:
Anon25 [30]3 years ago
7 0
Add all 5 numbers together then divide it by five and that will give you your answer
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Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 6.4. If 64 people ar
Murrr4er [49]

Answer:

99.38%

Step-by-step explanation:

We have that the mean (m) is equal to 124, the standard deviation (sd) 6.4 and the sample size (n) = 64

They ask us for P (x <126)

For this, the first thing is to calculate z, which is given by the following equation:

z = (x - m) / (sd / (n ^ 1/2))

We have all these values, replacing we have:

z = (126 - 124) / (6.4 / (64 ^ 1/2))

z = 2.5

With the normal distribution table (attached), we have that at that value, the probability is:

P (z <2.5) = 0.9938

The probability is 99.38%

4 0
3 years ago
Which point on the number line best represents the approximate value of 38?
Genrish500 [490]

Answer: Q

Step-by-step explanation: the 23 thing simplified would be 4 and a bunch of decimals. Q is the answer on four, and the 23 thing is closest to four, so Q would be the correct answer.

4 0
2 years ago
Read 2 more answers
I need help plzzzz I don't know how to​
Assoli18 [71]

it would be 48 because you would multiply 8 and 12 but then divide by 2

4 0
3 years ago
Read 2 more answers
OBO QBODO 100
leva [86]

Answer:

Inverse variation k=4

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent an inverse variation if it can be expressed in the form y*x=k or y=k/x

In this problem

The graph represent a inverse variation

Because

if x increases ----> y decreases

if x decreases ----> y increases

Find the value of k

we have that

For x=2, y=2 -----> see the graph

k=y*x

substitute

k=2*2=4

3 0
3 years ago
Last week during swim practice, Kamil swam 19 laps in 10.8 minutes. This week at swim practice, Kamil swam 18 laps in 12.6 minut
Lerok [7]
12.6min-10.8min =1.8min
6 0
3 years ago
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