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stepan [7]
3 years ago
9

Laura brought a new set of headphones for $4.45 and a video game for 9.55. if she paid with a $20 bill, how much change did she

get from her purchase?​
Mathematics
1 answer:
Aliun [14]3 years ago
6 0

Answer:

first we should add both purchase price

$4.45 + $9.55 = $14

so that

$20 - $14

=$6

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we know that slope of parallel lines are always equal

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m=\frac{y_2-y_1}{x_2-x_1}

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(b)

we know that slope of perpendicular line is -1/m

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we are given two points

(x1,y1)=(5,-1)

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x_1=5,y_1=-1

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(a)

we know that slope of parallel lines are always equal

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m=\frac{1+1}{3-5}

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(b)

we know that slope of perpendicular line is -1/m

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slope=\frac{-1}{m}

now, we can plug value

slope=\frac{-1}{-1}

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3 years ago
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Why are online payment services necessary?
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In this digital age, online payment services are added services that will make bill payments easier. 

Online stores and businesses have cropped up and their market is worldwide. To facilitate easy exchange of goods and services, online payment services are offered. 

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