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3 years ago

Write a formula for this sequence: 8,-1,-10,-19

1 answer:

4 0

This is an arith. sequence, and the common difference is -9.

a(n+1) = a(n)-9, with a(1)=8. Thus, if we look at the first term, we see 8; subracting 9 from 8 produces the second term (-1).

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Amran is helping her sixth grade classmates get ready for their math test by making them identical Packages of pencils and calcu

Sholpan [36]

Answer:

Step-by-step explanation:

3 0

3 years ago

Solve the equation n/10 + 5 =9. The solution is (Type the value of n.)

natita [175]

Answer:

Step-by-step explanation:

n/10+5=9

n/10=9-5

n/10=4

n=4*10

n=40

3 0

3 years ago

3x/2 - x = x/10 - 6/5

SVETLANKA909090 [29]

Answer: -3

X = -3

Step-by-step explanation:

Multiply the numbers i hope this helps god bless

8 0

2 years ago

Read 2 more answers

A supervisor records the repair cost for 14 randomly selected refrigerators. A sample mean of $79.20 and standard deviation of $

Nitella [24]

Answer:

( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

Critical value at 90% confidence = 1.645

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = $79.20

Standard deviation r = $10.41

Number of samples n = 14

Confidence interval = 90%

Using the z table;

The critical value that should be used in constructing the confidence interval.

z(α=0.05) = 1.645

Critical value at 90% confidence z = 1.645

Substituting the values we have;

$79.20+/-1.645($10.42/√14)

$79.20+/-1.645($2.782189528308)

$79.20+/-$4.576701774067

$79.20+/-$4.577

( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

5 0

3 years ago

What is the median. I have 3 more questions that have to deal with the median.

Rom4ik [11]

Answer:

Step-by-step explanation:

Median - The middle number in a list of numbers starting from least to greatest.

Knowing this, we can start.

The first step is to rewrite all the numbers from least to greatest

15, 19, 28, 32, 43, 52, 66, 72, 72, 81

Now cross off a number from the least and greatest until there is 1 or 2 numbers left

19, 28, 32, 43, 52, 66, 72, 72

28, 32, 43, 52, 66, 72

32, 43, 52, 66

43, 52

If you are left we 1 number, that is your answer. If you are left with 2 numbers, there is an extra step

In the case that you have 2 numbers, you need to add them together, and divide by 2

43 + 52 = 95

95 ÷ 2 = 47.5

Thus 47.5 is our answer

6 0

3 years ago