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3 years ago

14

Pool is 25ft long and 15 ft wide and the width of the walkway is to be the same all around the pool. How wide do I make the walk

way?

1 answer:

EastWind [94]3 years ago

8 0

You would need a 4 foot wide sidewalk.

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Find the slope of a line that passes through the points (3, -5) and (-7,5)

STatiana [176]

Answer:

Slope = -1

Step-by-step explanation:

$(3, -5 ) = (x_1,y_1) \\ (-7,5)=(x_2,y_2)$

$Slope = \frac{y_2-y_1}{x_2-x_1}$

Substitute values into the given equation

$slope \: = \frac{5 - ( - 5)}{ - 7 - 3} \\ \\ slope \: = \frac{5 + 5}{ - 7 - 3} \\ \\$

$slope \: = \frac{10}{ - 10} \\ slope \: = - 1$

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2 years ago

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Answer:

1

Step-by-step explanation:

12-4x=12-4x

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2 years ago

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3 years ago

Listed below are pulse rates (beats per minute) from samples of adult males and females. Does there appear to be a difference

MrMuchimi

Answer:

There appears to be a difference between the pulse rates from samples of adult males and females. The average pulse rate of males is 63.75 while that of females is 75.875.

Coefficient of Variation (male) = 33.44%

Coefficient of variation (female) = 28.35%

Step-by-step explanation:

Mean (male) = $\frac{sum of x}{n} =\frac{1020}{16} =63.75$

Mean (female) = $\frac{sum of y}{n} = \frac{1214}{16} = 75.875$

Standard Deviation (male) = $\sqrt{\frac{sum(x-63.75)^2}{16-1} } =21.315$

Standard Deviation (female) = $\sqrt{\frac{sum(y-75.875)^2}{16-1} } = 21.512$

Coefficient of Variation = $\frac{Std dev}{mean} *100$

For male, CV = $\frac{21.315}{63.75} *100=33.44%$ %

For female, CV = $\frac{21.512}{75.875} *100=28.35$ %

Comparison : Pulse rates of males has more variability than that of females since it has a greater coefficient of variation.

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3 years ago

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