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3 years ago

Karen wants to measure the height of the streetlight outside her house. She places a mirror on the ground 52

Mathematics

1 answer:

Mariana [72]3 years ago

5 0

Yeiehebei web e ddhsiwbw e did e

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A linear model of this situation contains the values (15, 300.2) and (26, 177.88) where x represents the number of square inches

maw [93]

Answer: Paula starts with 301.5 yarns.

Step-by-step explanation:

Equation of a line passing through two points (a,b) and (c,d) is given by:-

$(y-b)=\dfrac{b-d}{a-c}(x-a)$

Given: x= number of square inches knitted on the scarf

y= number of yarns remaining on the ball of yarn

The equation of a line passing through (15, 300.2) and (26, 177.88):

$(y-300.2)=\dfrac{26-15}{177.88-300.2}(x-15)\\\\\Rightarrow (y-300.2)=\dfrac{11}{-122.32}(x-15)\\\\\Rightarrow (y-300.2)=\dfrac{11}{-122.32}(x-15)$

To find initial point, put x=0

$y-300.2=-\dfrac{11}{122.32}(0-15)\\\\\Rightarrow\ y-300.2=\dfrac{375}{278}\\\\\Rightarrow\ y=\dfrac{375}{278}+300.2\\\\\Rightatrrow\ y=301.5 \ \ (approx)$

Hence, Paula starts with 301.5 yarns.

5 0

3 years ago

Divide and simplify. − 8 15 ÷ − 3 5 A) − 3 25 B) − 4 5 C) 13 15 D) 8 9 <br> A 100 points

lubasha [3.4K]

Step-by-step explanation:

- will be cancel

then

815/35= 23.28

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2 years ago

Ling wants to determine the average distance she travels each day in her car. She records the odometer reading, which measures t

erica [24]

Answer:

$Mean = 10724.29\ mi$

Step-by-step explanation:

Given

$n = 7$ --- days

See attachment for odometer readings

Required

The mean of the distance

Mean is calculated as:

$Mean = \frac{\sum x}{n}$

So, we have:

$Mean = \frac{10150 + 10211 + 10424 + 10769 + 10884 + 11155 + 11477}{7}$

$Mean = \frac{75070}{7}$

$Mean = 10724.2857143$

Approximate

$Mean = 10724.29\ mi$

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2 years ago

Joy bought 288 small pieces of candy to share with her friends. She divided the candy into 18 bags. One of the bags will be shar

mariarad [96]

Answer:

Step-by-step explanation:

You must divide 288 by 18 and then double the answer you get.

7 0

3 years ago

A wheel turns through 90 revolutions per minute how many degrees does it turn through in 1 second

suter [353]

Answer:

540°

Step-by-step explanation:

90 revolutions = 360°×90 = 32400°

32400° in 60 sec or 1 min

so, in 1 sec 32400/60 = 540°

7 0

3 years ago

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