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Marat540 [252]
3 years ago
12

What is the value of the summation ∑i=14(2i+6i2)

Mathematics
1 answer:
Alex787 [66]3 years ago
5 0
You need to know the following:

sigma(i) = 1/2 * i * (i+1)

sigma(i^2) = 1/6 * i * (i+1) * (2i+1)

Therefore, the answer should be 14( i(i+1) + i * (i+1) * (2i+1)) = 14i(i+1)(2i+2) = 28i(i+1)^2
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Need help can someone help me pleaseeee
Hunter-Best [27]

at first we write each one as a sequence

and find its equation

the first table

-19, -11, -3, 5

8x-19

the third table

15,12,9,6

-3x+15

the second table

-1. 5,1.5,3,4.5

+3 +1.5 +1.5

so the third table is the nonlinear function

8 0
4 years ago
The average cost for a gallon of gasoline increased from $2.56 one year to $3.18 the next year. What is the percent of increase,
Kitty [74]
From 2.56 to 3.18; 3.18-2.56=0.62 increased 
so if 2.56 represented 100%
       0.62 represents     ? %
cross multiply 
?%= 0.62·100/2.56=24.21875 which rounded to the nearest whole is 24%
Answer is B).
7 0
3 years ago
Read 2 more answers
Avery’s water bottle holds 300 milliliter. Dashawn’s container holds 3/4 as much water. How many milliliters do both containers
Nady [450]

Answer:

Both containers hold 225 ml.

Step-by-step explanation:

300/4 =75 so 1/4 is equal to 75 mL


300-75=225mL


Dashawn's water bottle holds 225mL

Hope this helps! :)


<h3>CloutAnswers</h3>
8 0
3 years ago
Read 2 more answers
This is the angle similarity of triangles btw. I will give brainliest to whoever finds the missing angle measures.
Basile [38]
1: 64
2: 59
3: 49
A triangle should always add up to 180 degrees. So just add up the angles you have and subtract them from 180
8 0
3 years ago
Read 2 more answers
Btw the answer has to be in fraction form if it’s a decimal then we will need to convert it into a fraction please help me
Misha Larkins [42]

Answer:

217 = 217/100 = 2.17

Step-by-step explanation:

6 0
3 years ago
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