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Tatiana [17]
3 years ago
8

Rachel is a stunt driver, and she's escaping from a building that is about to explode! The variable ddd models Rachel's distance

from her exit (in meters) seconds after the cameras began recording the stunt. d=-38t+220d=−38t+220d What is Rachel's speed?
Mathematics
1 answer:
ra1l [238]3 years ago
5 0

Answer:

38 meters per second

Step-by-step explanation:

We have been given that Rachel is a stunt driver, and she's escaping from a building that is about to explode! In equation d=-38t+220, the variable d models Rachel's distance from her exit (in meters) seconds after the cameras began recording the stunt. We are asked to find the Rachel's speed.

We can see that the slope of the given equation is negative 38. Since Rachel is escaping from the building, so distance is decreasing 38 meters per second.

We can see that 220 is initial value that represents initial distance.

Since distance is decreasing 38 meters per second, so Rachel is traveling at a rate of 38 meters per second.

Therefore, Rachel's speed is 38 meters per second.

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Age of each person in Kidz Zone
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3 years ago
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what is the smallest of 3 consecutive positive integers if the product of smaller two interfere is 5 less than 5 times the large
Lady_Fox [76]

Answer:

Two options:

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Step-by-step explanation:

Three consecutive natural numbers can be represented as n, n+1, and n+2.

The product of the smaller two would be n(n+1). The less than 5 times the larger is 5(n+2)-5.

Set them equal and solve by factoring:

n(n+1) = 5(n+2) -5\\n^2+n = 5n+10 -5\\n^2+n = 5n+5\\n^2 -4n-5=0\\(n-5)(n+1)=0

Set each factor equal to 0.

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n+1=0 so n=-1.

This means the 3 consecutive numbers would be 5,6, and 7

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8 0
3 years ago
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tamaranim1 [39]

Answer:

64ft

Step-by-step explanation:

1. find the area of both plots of land.

      4x4=16       6x8=48

2. add the two areas together

     16+48=64ft

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