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2 years ago

What is (3x+12)-(6x+5)

Mathematics

1 answer:

yaroslaw [1]2 years ago

7 0

Answer: -3x + 7

Step-by-step explanation: All you have to do is combine like terms

First, you combine 3x - 6x which, will give you -3x

Second, you combine 12 - 5 which will give you 7

3x - 6x = -3x

12 - 5 = 7

So, combine the answers and you will get -3x + 7

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ser-zykov [4K]

Answer: 36 sec

Step-by-step explanation:

Let

x------> distance the kitten runs before being caught by the puppy

Remember that

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v=d/t

solve for t

t=d/v

equate the time

x/20=(180+x)/25

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25x=3,600+20x

25x-20x=3,600

x=3,600/5=720 m

t=d/v=720/20=36 sec

t=(720+180)/25=900/25=36 sec

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