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Vadim26 [7]
3 years ago
6

The Paulsens ordered $75.41 worth of Chinese food. They paid 11.5% sales tax and left a 15% tip on $75.41. What was the total co

st?
Please help me :(
Mathematics
1 answer:
mafiozo [28]3 years ago
8 0
75.41*11.5= 8.67
75.41+8.67=84.08
84.08*15%=12.61
84.08+12.61= 96.69
The total is $96.69
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Write the slope-intercept form of the equation that passes through the given points. (separate equations for each of them)
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Answer:

Part 1) y=-\frac{1}{5}x-1

Part 2) y=3x-16

Part 3) y=4

Step-by-step explanation:

we know that

The equation of the line into slope intercept form is equal to

y=mx+b

where

m is the slope

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Part 1) we have

(10,-3) (5,-2)

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The formula to calculate the slope between two points is equal to

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substitute

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we have

m=-\frac{1}{5}

point (10,-3)

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-3=-\frac{1}{5}(10)+b

-3=-2+b

b=-3+2=-1

substitute

y=-\frac{1}{5}x-1

Part 2) we have

(6,2) (7,5)

<u><em>Find the slope</em></u>

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute

m=\frac{5-2}{7-6}

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we have

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substitute in the equation y=mx+b  and solve for b

2=3(6)+b

2=18+b

b=2-18=-16

substitute

y=3x-16

Part 3) we have

(4,4) (-7,4)

<u><em>Find the slope</em></u>

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute

m=\frac{4-4}{-7-4}

m=\frac{0}{-11}

m=0

This is a horizontal line (parallel to the x-axis)

The y-intercept b is equal to the y-coordinate

<em>therefore</em>

The equation of the line is

y=4

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