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3 years ago

Which is the best estimate of each percent? 48% of 60

Mathematics

2 answers:

melamori03 [73]3 years ago

7 0

Answer:

$28.8\:\: \mathrm{or}\:\: 28\frac{4}{5}$

Step-by-step explanation:

48% of 60

$\frac{48}{100} \times \frac{60}{1}$

Cross divide; cancel the zeros in 100 and 60

$\frac{48}{10} \times \frac{6}{1}$

Divide 10 and 6 by 2

10 ÷ 2 = 5

6 ÷ 2 = 3

$\frac{48}{5} \times \frac{3}{1}$

Simplify

48 × 3 = 144

5 × 1 = 5

$\frac{144}{5}$

Simplify

$\frac{144}{5} = 28.8\:\: \mathrm{or}\:\: 28\frac{4}{5}$

netineya [11]3 years ago

4 0

28.80 is the answer so of= x so yea

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Given:

The two points are (-1,10) and (2,4).

To find:

The equation of line which passes though the given points.

Solution:

If a line passes through two points, then the equation of line is

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The line passes through (-1,10) and (2,4). So, the equation of line is

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3 years ago

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Mika can eat 21 hot dogs in 6 minutes. She wants to know how many minutes (m) it would take her to eat

kipiarov [429]

Answer:

The answer is 10 minutes.

Step-by-step explanation:

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4 years ago

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4 years ago

Daily high temperatures in St. Louis for the last week were as follows: 95, 92, 93, 92, 95, 90, 90 (yesterday). a) The

hichkok12 [17]

Answer:

a) T = 91.7 degrees

b) T = 90 degrees

c) MAD = 1.9

d) MSE = 5.05

Step-by-step explanation:

Given:

- Daily high temperatures in St. Louis for the last week were as follows:

95, 92, 93, 92, 95, 90, 90

Find:

a) Forecast the high temperature today, using a 3-day moving average.

b) Forecast the high temperature today, using a 2-day moving average.

c) Calculate the mean absolute deviation based on a 2-day moving average, covering all days in which you can have a forecast and an actual temperature.

d) The mean squared error for the 2-day moving average

Solution:

- The set of 3 day moving average is as follows:

4. (95 + 92 + 93) ÷ 3 = 93.33⁰C

5. (92 + 93 + 92) ÷ 3 = 92.33⁰C

6. (93 + 92 + 95) ÷ 3 = 93.33⁰C

7. (92 + 95 + 90) ÷ 3 = 92.33⁰C

8. (95 + 90 + 90) ÷ 3 = 91.667⁰C

- Now use these points on excel sheet to forecast the temperature for today. The line of best fit is given:

T = 91.7 degrees

- The set of 2 day moving average is as follows:

3. (95 + 92) ÷ 2 = 93.5⁰C

4. (95 + 93) ÷ 2 = 92.5⁰C

5. (93 + 92) ÷ 2 = 92.5⁰C

6. (92 + 95) ÷ 2 = 93.5⁰C

7. (95 + 90) ÷ 2 = 92.5⁰C

8. (90 + 90) ÷ 2 = 90⁰C

- Now use these points on excel sheet to forecast the temperature for today. The line of best fit is given:

T = 90 degrees

Error Error^2

3. 93.5⁰C 0.5 0.25

4. 92.5⁰C 0.5 0.25

5. 92.5⁰C 2.5 6.25

6. 93.5⁰C 3.5 12.25

7. 92.5⁰C 2.5 6.25

8. 90⁰C

- The mean absolute deviation as follows:

MAD = Sum of all errors / 5

MAD = (0.5+0.5+2.5+3.5+2.5) / 5

MAD = 1.9

- The mean squared error deviation as follows:

MSE = Sum of all error^2 / 5

MSE = (0.25+0.25+6.25+12.25+6.25) / 5

MSE = 5.05

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3 years ago