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2 years ago

Prove algebraically that n^2-2-(n-2)^2 is always even

Mathematics

2 answers:

Juliette [100K]2 years ago

6 0

Answer:

It is even because it is equal to 2(2n-3) so you can divide it by two and get (2n-3)

Step-by-step explanation:

${n}^{2} - 2 - ( {n}^{2} + 4 - 4n) = \\ {n}^{2} - 2 - {n}^{2} - 4 + 4n = \\ 4n - 6 = 2(2n - 3)$

tresset_1 [31]2 years ago

3 0

Step-by-step explanation:

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Jan took her brother out to dinner. The cost of Jan’s dinner was $18.50. The cost of her brother’s dinner was $19.00. If they wa

Vikki [24]

The total bill that would be paid by Jan is equal to $43.125.

Given the following data:

Cost of Jan’s dinner = $18.50.

Cost of brother’s dinner = $19.00.

Tip = 15%

To determine the total bill that would be paid by Jan:

First of all, we would calculate the total cost of their dinner as follows:

$Total\;cost = 18.50 + 19.00$

Total cost = $37.50

Next, we would calculate the tip cost for the total cost of their dinner:

$Tip\;cost = \frac{15}{100} \times 37.5\\\\Tip\;cost =0.15\times 37.5$

Tip cost = $5.625

For the total bill:

$Total\;bill = Total\;cost + Tip\;cost\\\\Total\;bill = 37.5 + 5.625$

Total bill = $43.125.

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2 years ago

Solve pls brainliest

andre [41]

Answer:

Step-by-step explanation:

1. no-has decimal

2. yes, simplifies to -2

3. yes

4. yes

5. no-2.1

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2 years ago

A pillow that usually costs $18 is marked down 25%. Use the table to find the pillow’s new price

zlopas [31]

Answer:

13.50

Step-by-step explanation:

First find the discount

18 * 25%

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2 years ago

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aliya0001 [1]

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2 years ago

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Ksenya-84 [330]

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2 years ago

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