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Blizzard [7]
2 years ago
12

Kayden is a stunt driver. One time, during a gig where she escaped from a building about to explode(!), she drove at a constant

speed to get to the safe zone that was 160 meters away. After 3 seconds of driving, she was 85 meters away from the safe zone. Let D represent the distance (in meters) from the safe zone after t seconds. Complete the equation for the relationship between the distance and number of seconds.
Mathematics
1 answer:
krek1111 [17]2 years ago
3 0

d=160-25t

Step-by-step explanation:

Let d be the distance between Kayden and safe zone at any time.

It is given that initially d=160

Lrt her speed be v

Since the speed is constant,the distance covered by her in t seconds=v\times t

So,the distance between her and safe zone after t seconds is 160-vt

It is given that after 3 seconds,d=85

So,160-3v=85

3v=75

v=25

So,d=160-3t

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Can someone explain this?
Cerrena [4.2K]
<h2>Hello!</h2>

The answer is:

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<h2>Why?</h2>

To find which is the missing step, we need to remember that to cancel a square root, we need to elevate it, so:

Starting from the last step before the missing step, we have:

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We must remember the following properties:

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So, squaring both sides of the equation in order to cancel the square root and isolate the variable, we have:

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Hence, we found the the missing step is:

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