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r-ruslan [8.4K]
2 years ago
8

Can someone help me with this math homework please!

Mathematics
1 answer:
love history [14]2 years ago
3 0

1. f(-6)=8

2.-2

3. 4

Hope this helps you...

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Name the property used in: (5 + 2) + n = 7 + n
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Additive indentity
(5 + 2) + n
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A cartographer wants to create a map of Seattle. He has designed key/legend for the map indicating that 1 cm equals 2 miles. If
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On a journey of 600 km, a train was delayed 1 hour and 30 min after having covered 1/4 of the way. To arrive on time at the dest
Sati [7]

Answer:

10 hours

Step-by-step explanation:

(150/x) + 1.5 + (450/(x+15)) = 600/x

Multiply through by x(x + 15):

150(x + 15) + 1.5x(x + 15) + 450x = 600(x + 15)

150x + 2250 + 1.5x^2 + 22.5x + 450x = 600x + 9000

150x + 2250 + 1.5x^2 + 22.5x + 450x - 600x - 9000 = 0

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x = (-22.5 +/- sqrt(22.5^2 - 4(1.5)(-6750))) / (2*1.5)

x = (-22.5 +/- sqrt(506.25 + 40500)) / 3

x = (-22.5 +/- sqrt(41006.25)) / 3

x = (-22.5 +/- 202.5) / 3

x = 180/3 or -225/3

x = 60 or -75

But a negative number doesn't make sense, so therefore x = 60, so the journey took 600/60 = 10  hours.

6 0
3 years ago
I need help ASAP!!!PLEASE EXPLAIN HOW TO SOLVE THE PROBLEM
sergij07 [2.7K]

hopefully this answer can help you to answer the next question

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Determine the slope for the line below
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7 0
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