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Kaylis [27]
3 years ago
5

Find the sum and choose the correct answer.2n 3 + 4n 2 - 7 and -n 3 + 8n - 9

Mathematics
2 answers:
Delvig [45]3 years ago
7 0
N<span><span><span>​3</span><span>​​</span></span>+4<span>n<span><span>​2</span><span>​​</span></span></span>+8n−16
  hope helped
</span>
Salsk061 [2.6K]3 years ago
4 0

Answer:

The correct answer for the sum is : n^{3} + 4n^{2} + 8n -16

Step-by-step explanation:

We start by adding each n term, n3 with n3 and the same with n2, n and then numbers

(2n^{3} + 4n^{2} -7 ) +  ( -n^{3} + 8n -9)

(2-1)n^{3}

(4+0)n^{2}

(8+0)n

(-7-9)

n^{3} + 4n^{2} + 8n -16

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What is the height, in yards, of a cylindrical water tank that holds 1,884 cubic yards of water and has a diameter of 120 feet?
mafiozo [28]

Answer:

The height of the tank is 0.5 yards.

Step-by-step explanation:

To determine what is the height, in yards, of a cylindrical water tank that holds 1,884 cubic yards of water and has a diameter of 120 feet, knowing that the volume of a cylinder is equal to pi multiplied by the radius squared, multiplied by the height, the following calculation must be done:

1 foot = 0.3333 yards

R = Diameter / 2

R = 120/2 = 60

3.14 x 60 ^ 2 x H = 1,884

3.14 x 3,600 x H = 1,884

3.14 x 1,200 x H = 1,884

3.768 x H = 1.884

H = 1,884 / 3,768

H = 0.5

Therefore, the height of the tank is 0.5 yards.

7 0
3 years ago
Bella's Bakery charges $2.25 per cupcake
Sveta_85 [38]

Answer:

6 cookies

Step-by-step explanation:

first, find how much money they spent on cupcakes

6 × $2.25 = $13.5

then, take $13.5 and subtract that by $24

$24 - $13.5 = $10.5

so the person spent $10.5 on cookies. divide the amount per cookie by $10.5

$10.5 ÷ $1.75 = 6

so they bought 6 cookies

8 0
3 years ago
At the movies, Jill and Carly each buy a
grin007 [14]

Answer:

where is the graph?

Step-by-step explanation:

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4 0
2 years ago
for any positive integer n, the sum of the first n positive integers equals n(n 1)/2. what is the sum of all the even integers b
marusya05 [52]

The sum of all the even integers between 99 and 301 is 20200

To find the sum of even integers between 99 and 301, we will use the arithmetic progressions(AP). The even numbers can be considered as an AP with common difference 2.

In this case, the first even integer will be 100 and the last even integer will be 300.

nth term of the AP = first term + (n-1) x common difference

               ⇒    300 = 100 + (n-1) x 2

Therefore, n = (200 + 2 )/2 = 101

That is, there are 101 even integers between 99 and 301.

Sum of the 'n' terms in an AP = n/2 ( first term + last term)

                                                = 101/2 (300+100)

                                                = 20200

Thus sum of all the even integers between 99 and 301 = 20200

Learn more about arithmetic progressions at brainly.com/question/24592110

#SPJ4        

7 0
1 year ago
Which expression have a value between 7 and 8 π+4 2II √62 √48 √56​
lilavasa [31]

Answer:

square root 48

Step-by-step explanation:

It is square root 48 because it is between 7 and 8 not exactly if it was exactly 7 and 8 it would be square root 56

7 0
2 years ago
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