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3 years ago

Arithmetic Series Algebra 2

Mathematics

2 answers:

Angelina_Jolie [31]3 years ago

4 0

$=\displaystyle\sum_{n=1}^{50}{(2n)}-\sum_{n=1}^{50}{(3)}=2\sum_{n=1}^{50}{(n)}-50\cdot 3\\\\=2\frac{50(50+1)}{2}-150=2550-150\\\\=2400$

_____

The sum of the integers 1 to n is well-known to be n(n+1)/2. Here, we have that sum for n=50.

Aleonysh [2.5K]3 years ago

3 0

The answer is 2400! Yup it is so ya.

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Slove the following:

Aleksandr [31]

Answer:

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Answer:

Step-by-step explanation:

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a car purchased for $34,000 is expected to lose value, or depreciate, at a rate of 6% per year.using x for years and y for the v

Vika [28.1K]

Answer:

$y = 34000(1-0.06) ^ t$

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Step-by-step explanation:

This problem is solved using a compound interest function.

This function has the following formula:

$y = P(1-n) ^ t$

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P is the initial price = $ 34,000

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The equation that models this situation is:

$y = 34000(1-0.06) ^ t$

Now we want to know after how many years the car is worth less than $ 21500.

Then we do y = $ 21,500. and we clear t.

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After 7.40 years it will be worth less than 21500

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3 years ago

Mark's cell phone provider charges a monthly fee of $24.95 and $0.10 per each text message (t) sent or received. The total month

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Answer:

Step-by-step explanation:

the answer is 25.00 hope this helps

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3 years ago

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lianna [129]

Answer:

7 pizzas and 9 cans of juice

Step-by-step explanation:

The answer is 7 pizzas because if you add the 25 people plus her parents (That would be two more people) is 27. Then you have to multiply 27×2 that would equal 54. So, now you know you need 54 slices but what you is the amount of pizzas needed. The next step would be to divide 54÷8 that would equal 6.75 but you can't buy 6.75 pizzas, and you can't buy 6 pizzas because than you would leave people outside. You will need to buy 7 pizzas. It is better to have left overs than leaving people outside.

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3 years ago