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mote1985 [20]
3 years ago
10

Please help me with this math question I really need help ;/. I'll give brainliest if u help.

Mathematics
1 answer:
Darya [45]3 years ago
7 0

Step-by-step explanation: You have to substitute the numbers in for x & y

(0, -5): YES

3x - 4y - 8 = 12

3(0) - 4(-5) - 8 = 12

0 + 20 - 8 = 12

20 - 8 = 12

12 = 12


(4, -2): YES

3x - 4y - 8 = 12

3(4) - 4(-2) - 8 = 12

12 + 8 - 8 = 12

20 - 8 = 12

12 = 12


(8, 2): NO

3x - 4y - 8 = 12

3(8) - 4(2) = 12

24 - 8 = 12

16 = 12


(-16, -17): YES

3x - 4y - 8 = 12

3(-16) - 4(-17) - 8 = 12

-48 + 68 - 8 = 12

20 - 8 = 12

12 = 12


(-1, -8): NO

3x - 4y - 8 = 12

3(-1) - 4(-8) = 12

-3 + 32 = 12

29 = 12


(-40, -34): NO

3x - 4y - 8 = 12

3(-40) - 4(-34) - 8 = 12

-120 + 136 - 8 = 12

16 - 8 = 12

8 = 12


Hope this help you!!! :)

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Lana71 [14]

<em><u>Part B (Taxi):</u></em>

12 miles = 0.5 miles + (115×0.1) miles

Rate: $2.40 + (115×0.20)

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Total cost (with tip): $25.40 + $2

                               = $27.40

20 miles = 0.5 miles + (195×0.1) miles

Rate: $2.40 + (195×0.20)

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Total cost (with tip): $41.40 + $2

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Total cost (with tip): $101.40 + $2

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12 miles (rate) = $1 + ($1.05×12)

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Total cost (with tip): $13.60 + $2

                               = $15.60

20 miles (rate) = $1 + ($1.05×20)

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Total cost (with tip): $22 + $2

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50 miles (rate) = $1 + ($1.05×50)

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Total cost (with tip): $53.50 + $2

                               = $55.50

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Uber is a better mode of transportation. This is because given the same distance travelled for both the taxi and the Uber, Uber has a lower cost compared to the taxi.

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