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9966 [12]
3 years ago
13

Two or more complete sentences, explain how to use ordered pairs of points in f(x) and g(x) to determine if f(x) and g(x) are in

verses of each other.
Mathematics
1 answer:
kati45 [8]3 years ago
6 0
If f(x) is an inverse of g(x),

when
f(x)=y
g(y)=x

aka
f(g(x))=x
g(f(x))=x


basically, the values should be swiched

example
f(x)=
(1,2)
(2,3)
(4,5)
then g(x)=
(2,1)
(3,2)
(5,4)
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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

1.5x^2 + 22.5x - 6750 = 0

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
PLEASE HELP ME :(( i tried 12 as the answer and it’s wrong
AnnZ [28]

I think its 1/6

I'm not sure tho

u take the bottom and subtract it by the top then multiply

6 0
3 years ago
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Which of the following represents this function written in intercept form?
rodikova [14]
The answer is 

C. - (x + 3)(x - 4)

because if you solve this....

- (x + 3)(x - 4)
(-x - 3)(x - 4)
-x^2 +4x - 3x + 12

-x^2 + x + 12 
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3 years ago
What is 39+21g when g = -4
timurjin [86]

Answer:

-45

Step-by-step explanation:

When the -4 is plugged in, it needs to be multiplied and then added to 39. That equals -45.

8 0
3 years ago
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Mr. Smith runs a sprinkler 150 m in 14.98 seconds Steve runs his sprinkler 100 m in 10.23 seconds who’s sprinkler is faster
kap26 [50]

Answer:

steve becaise its less secinds

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3 years ago
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