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3 years ago

Help me with this math assignment please

Mathematics

2 answers:

Nataliya [291]3 years ago

8 0

Answer:

A1. No (4 more than 4²)

A2. Yes - 6 * 6 = 36

A3. Yes - 7 * 7 = 49

A4. No (4 more than 8²)

A5. Yes - 11 * 11 = 121

A6. Yes - 13 * 13 = 169

A7. Yes - 20 * 20 = 400

A8. No (6 more than 12²)

B1. 8

B2. 10

B3. 9

B4. 4

B5. 2

B6. 0

B7. 5

B8. 4

C1. 11.4

C2. 2.8

C3. 9.2

C4. 6.3

C5. 4.9

C6. 10.5

D1. Rational

D2. Rational

D3. Irrational (closest rational (2 decimal places) is -1.41)

D4. Rational

D5. Irrational (closest rational (2 decimal places) is 2.23)

D6. Irrational (closest rational (2 decimal places) is 3.14)

D7. Rational

D8. Rational (simplifies to 4)

D9. Rational

D10. Rational (same as 0.75)

D11. Irrational (because of the dots)

D12. Rational (5/13 pattern goes like this: 384615)

murzikaleks [220]3 years ago

5 0

Answer:

<u>A.</u>

1. No

2. Yes, 6*6=36

3. Yes, 7*7=49

4. No

5. Yes, 11*11=121

6. Yes, 13*13=169

7. Yes, 20*20=400

8. No

1. 8

2. 10

3. 9

4. 4

5. 2

6. 0

7. 5

8. 12

1. 11.4

2. 2.8

3. 9.2

4. 6.3

5. 4.9

6. 10.5

1. rational

2. rational

3. irrational

4. rational

5. irrational

6. irrational

7. rational

8. rational

9. rational

10. rational

11. irrational

12. irrational?

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Consider a nine -year moving average used to smooth a time series that was first recorded in 1961. a. Which year serves as the f

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a. 1965

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Step-by-step explanation:

For answers to questions like these it can work to consider the smallest possible dataset.

<h3>Dataset</h3>

For our purpose, consider the 9 years/values to be averaged to be ...

1, 2, 3, 4, 5, 6, 7, 8 ,9

<h3>Observations</h3>

a. The center value of the data set is 5. Its number is 5-1=4 more than the first one.

The first centered value is from the year 1961 +4 = 1965.

b. The 4 values at the beginning, and the 4 values at the end do not have a corresponding "average" value. That is, 4+4 = 8 values in the series are lost with respect to the number of average values.

8 years of values are lost.

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2 years ago

What is three quarters of £42 and a quarter of £42

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4 years ago

Read 2 more answers

Forensic specialists can estimate the height of a deceased person from the lengths of the person's bones. These lengths are subs

Lera25 [3.4K]

Answer:

$130.2845\leq h\leq 137.7245$

Step-by-step explanation:

Given an inequality that relates the height h, in centimeters, of an adult female and the length f, in centimeters, of her femur by the equation

$|h - (2.47f + 54.10)| \leq 3.72$

If an adult female measures her femur as 32.25 centimeters, we can determine the possible range of her height by plugging f = 32.25cm into the modelled equation as shown:

$|h - (2.47(32.25) + 54.10)| \leq 3.72\\|h - (79.9045 + 54.10)| \leq 3.72\\|h - (134.0045)| \leq 3.72\\$

If the modulus function is positive then:

$h - 134.0045 \leq 3.72\\h \leq 3.71+134.0045\\h\leq 137.7245$

If the modulus function is negative then:

$-(h - 134.0045) \leq 3.72\\-h+134.0045 \leq 3.72\\-h\leq 3.72-134.0045\\-h\leq -130.2845\\$

multiply through by -1

$-(-h)\geq -(-130.2845)\\h\geq 130.2845\\130.2845\leq h$

combining the resulting inequalities, the estimate of the possible range of heights will be $130.2845\leq h\leq 137.7245$

8 0

3 years ago