3 years ago

I need help with the maths

Mathematics

2 answers:

Gnesinka [82]3 years ago

4 0

Answer: 1. Function 2. Not a function 3. Not a function

Step-by-step explanation:

( this is an guess so don’t judge much)

padilas [110]3 years ago

3 0

Answer: a and b are functions c is not a function

Step-by-step explanation:

I’m smart

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4 years ago

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jekas [21]

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3 years ago

A cruise ship is currently 20 kilometers away from its port and is traveling away from the port at 5 kilometers per hour . The f

Paladinen [302]

Answer:

The ship will be $37.5\ km$ far from its port 3.5 hours from now

Step-by-step explanation:

The function is $y=5x +20$ relates the number of kilometers y the ship will be from its port x hours from now, it has a form $y=vt+y_{0} \ where \ y\ is\ final\ distance\\v\ is\ velocity\ in\ km/h,\ t\ is\ time\\and\ y_{0}\ is\ initial\ distance$ .

As the function is clearly defined, we only have to evaluate it for $x=3.5$ , so $y(3.5)=5(3.5)+20=17.5+20=37.5 \ km$ is the distance between the cruise ship and its port after 3.5 hours.