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antoniya [11.8K]
3 years ago
13

Select the correct answer.

Mathematics
1 answer:
lesya692 [45]3 years ago
6 0

Answer:

The Answer is A. slope = 1.5 and y-intercept = -2

Step-by-step explanation:

In y=mx+b form b represents your y-intercept and m (or the number next to the x) is your slope

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Ky wants to buy three shirts, which were originally priced at $49.96 each. The store will discount the price of the 3rd shirt by
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Answer:

  $44.49

Step-by-step explanation:

The total cost before tax will be ...

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With tax added, the cost is ...

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Which best describes the graphs of the line that passes through (−12, 15) and (4, −5), and the line that passes through (−8, −9)
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Answer:

C) They are perpendicular lines.

Step-by-step explanation:

We first need to find the slope of the graph of the lines passing through these points using:

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

The slope of the line that passes through (−12, 15) and (4, −5) is

m_{1} =  \frac{ - 5 - 15}{4 -  - 12}

m_{1} =  \frac{ - 20}{16}  =  -  \frac{5}{4}

The slope of the line going through (−8, −9) and (16, 21) is

m_{2} =  \frac{21 -  - 9}{16 -  - 8}

m_{2} =  \frac{21  + 9}{16  + 8}

m_{2} =  \frac{30}{24}  =  \frac{5}{4}

The product of the two slopes is

m_{1} \times m_{2} =  -  \frac{4}{5}  \times  \frac{5}{4}  =  - 1

Since

m_{1} \times m_{2} =  - 1

the two lines are perpendicular.

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20,612,439 in scientific notation
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