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IgorLugansk [536]
3 years ago
5

The sum of the first 65 odd, positive integers is?

Mathematics
1 answer:
Aleksandr [31]3 years ago
7 0
1+3+5+7+9+11+...\\\\This\ is\ an\ atihmetic\ progression\ where\ a_1=1\ and\ d=2.\\\\The\ sum:S_n=\frac{2a_1+(n-1)d}{2}\cdot n\\\\S_{65}=\frac{2\cdot1+(65-1)\cdot2}{2}\cdot65=\frac{2+64\cdot2}{2}\cdot65=\frac{2+128}{2}\cdot65\\\\=\frac{130}{2}\cdot65=65\cdot65=4225
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Evaluate the expression 15-n when n =8
Dvinal [7]

Answer:

7

Step-by-step explanation:

if : n = 2    : 15 -  n = 15 - 8 = 7

4 0
3 years ago
Which is true about the polynomial -8m3 11m?O It is a binomial with a degree of 2.O It is a binomial with a degree of 3.O It is
koban [17]
-8m^3 + 11m....notice that it has 2 terms....(-8m^3) and (11m). Having 2 terms makes it a binomial...if it would have had 3 terms, it would have been a trinomial. If it has only one variable, the degree is the highest exponent...so this has a degree of 3 since ^3 is the highest exponent.
so ur answer is : binomial with a degree of 3
3 0
3 years ago
Read 2 more answers
Jaiden ran a 100 yard dash three times and took the average of his times. His times were 12.7, 11.2 and 11.8 seconds. On average
tekilochka [14]

Using the mean concept, it is found that on average, it takes him 11.9 seconds to run a 100 yard dash.

<h3>What is the mean?</h3>

The mean of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.

In this problem, the three observations are given by:

12.7 s, 11.2 s, 11.8 s.

Hence the mean is:

M = (12.7 + 11.2 + 11.8)/3 = 11.9.

On average, it takes him 11.9 seconds to run a 100 yard dash.

More can be learned about the mean of a data-set at brainly.com/question/24628525

#SPJ1

4 0
2 years ago
Need help no links please
Sveta_85 [38]

Answer:

(2x + 6)/3 = y

Step-by-step explanation:

2x + 5 = 3y - 1

2x + 5 + 1 = 3y

(2x +6)/3 = 3y

4 0
3 years ago
Maths help please!!!!!!!!
boyakko [2]

Answer: The answer is a

Step-by-step explanation:

Let's solve for f.

fx=2x^3−3x^2

Step 1: Divide both sides by x.

fx/x =2x^3−3x^2/x

f=2x^2−3x

Answer:

f=2x^2−3x

6 0
3 years ago
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