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Lena [83]
2 years ago
7

As an estimation we are told 5 miles is 8 km.Convert 55 miles to km​

Mathematics
2 answers:
aleksandrvk [35]2 years ago
4 0
Answer:
440 km

Answer:
puteri [66]2 years ago
3 0

Answer:

88 km.

Step-by-step explanation:

If 5 miles is 8 km,

55 miles is 88 km.

What you need to do is 55/5 = 11.

Then multiply that 11 to 8.

11 * 8 = 88.

Basically, if you are multiplying 5 by 11 to get 55, you need to multiply 8 by 11 to get 88.

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Answer:

3/4 hour or 45 minutes

It will take 0.75 hours or 45 minutes or 2700 seconds to paint one wall according to the rate we're given.

:)

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3 years ago
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If the sum of a number and four is tripled the result is eight less than twice the number
Drupady [299]

Answer:

The number is -20.

Step-by-step explanation:

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3x+12=2x-8

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Best answer gets brainliest!
nikitadnepr [17]

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Prove by mathematical induction that 1+2+3+...+n= n(n+1)/2 please can someone help me with this ASAP. Thanks​
Iteru [2.4K]

Let

P(n):\ 1+2+\ldots+n = \dfrac{n(n+1)}{2}

In order to prove this by induction, we first need to prove the base case, i.e. prove that P(1) is true:

P(1):\ 1 = \dfrac{1\cdot 2}{2}=1

So, the base case is ok. Now, we need to assume P(n) and prove P(n+1).

P(n+1) states that

P(n+1):\ 1+2+\ldots+n+(n+1) = \dfrac{(n+1)(n+2)}{2}=\dfrac{n^2+3n+2}{2}

Since we're assuming P(n), we can substitute the sum of the first n terms with their expression:

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P(n+1):\ 1+2+\ldots+n+(n+1) =\dfrac{n^2+3n+2}{2}

as required

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3 years ago
Which statement justifies that 3x² − 2x − 4 multiplied by 2x² + x − 3 obeys the closure property of multiplication?
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Step-by-step explanation:

(3x2 - 2x - 4) (2x2 + x - 3)

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Solving like terms

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