What is the domain of the function shown in the mapping?

Mathematics

1 answer:

EastWind [94]3 years ago

4 0

Answer:

it's A

Step-by-step explanation:

The domain is all the input values which is x|x=-5,-3,1,2,6

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A bicyclist heads east at 10km/h. After she has traveled 24.2 kilometers, another cyclist sets out in the same direction going 3

Alona [7]

We know that the first cyclist has traveled 24.2 km at a speed of 10 km/h. Lets use the equation $time= \frac{distance}{speed}$ to find the time of the first cyclist:
$t= \frac{24.2}{10}$
$t=2.42$
So, we know that she has traveled for 2.42 hours.

We also know that after she has traveled for 2.42 hours another<span> cyclist sets out in the same direction, so if </span> $t$ represents the time of our first cyclist, <span>the time of our second cyclist will be </span> $t-2.42$ .

Now we are going to use the equation $distance=(speed)(time)$ to relate the speeds and times of the two cyclist:
For the first one:
$distance=10t$ equation (1)
For the second one:
$distance=30(t-2.42)$ equation (2)

Replace (1) in (2)
$10t=30(t-2.42)$
The only thing left now is solve for $t$ :
$10t=30t-72.6$
$-20t=-72.6$
$t= \frac{-72.6}{-20}$
$t=3.63$

We can conclude that the second cyclist will catch up the first cyclist after 3.63 hours.

4 0

3 years ago

Using y=6-3x plot the ordered pairs from the table then graph the function represented by the ordered pairs and tell whether the

Alborosie

Answer:

9 , -9, -15, -21

Step-by-step explanation:

6-3x-1=-9

6-3x1=9

6-3x3=-15

6-3x5=-21

3 0