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zloy xaker [14]
3 years ago
15

Can someone plss help me with this!!

Mathematics
2 answers:
zalisa [80]3 years ago
6 0

Answer: 1) f(3)= -11 and 2) f(-7)= 19

Step-by-step explanation: f(x) means 'function of x' or just to replace x with the desired value. For example, f(3) just means x=3. Following below is written proof.

zubka84 [21]3 years ago
4 0

Answer:

f(3) = -11, f(-7) = 19

Step-by-step explanation:

f(x) = -3x -2

1.

f(3) is the f(x) when x = 3 so where we see x in the equation we write 3 and calculate

f(3) = -3(3) -2 = -9 -2 = -11

2.

f(-7)  = f( x= -7) = -3(-7) -2 = 21 -2 = 19

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So, how far is the car from where it was at t = 0 is 40 m

<h3>Velocity of the car</h3>

Since the location x of the car in meters is given by the function x = 30t - 5t² where t is in seconds, we need to find the time at which its velocity is 10 m/s in the negative direction by differentiating x with respect to t to find its velocity, v.

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So, v = 30 - 10t

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<h3>The distance at 4 s when its velocity is -10 m/s</h3>

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Learn more about distance of car here:

brainly.com/question/17097458

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