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LenaWriter [7]
2 years ago
8

Help me will give brain

Mathematics
1 answer:
Marat540 [252]2 years ago
3 0

Answer:

Umm sure what you want..

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Please help on one math question
kipiarov [429]

Hello from MrBillDoesMath!

Answer:

225

Discussion:

Sum ( 2n - 1)                  from  n = 1 to 15              

= Sum(2n) - Sum(1)        from n = 1 to 15

= 2 Sum(n) - Sum(1)       from n = 1 to 15

= 2* 15(15+1)/2  - (1 + 1 + .. + 1)

The first value comes from the fact that the sum of the first n integers is  n(n+1)/2. The latter value sums 15 1's.

= 2 * 15 * 16/2 - 15                    => 2/2 = 1

= 15*16 - 15                               => 15*16 = 240

= 240 - 15

= 225

Thank you,

MrB

6 0
3 years ago
Read 2 more answers
Which is NOT a function? <br> A y – x = 6<br> B y = 2x<br> C x = -2<br> D y + x = 12
Fantom [35]

Answer:

D

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
GEOMETRY HELPP -- WILL MARK BRAINLIEST
lukranit [14]

Answer: d = 29 miles

Step-by-step explanation:

S11°W  = 259° on a unit circle

N75°E = 15° on a unit circle

x separation after two hours

x = 2(8cos15 - 18cos259) = 21.179 miles

y separation after two hours

x = 2(8sin15 - 18sin259) = 19.7398 miles

total distance between them is

d = √(19.7398² + 21.179²) = 28.9518... ≈ 29 miles

3 0
3 years ago
Hello If You Can Please Help Me With This Question
Kipish [7]

Answer:

5807259.34663

Step-by-step explanation:

Calculator! Yeah!

Hope this helps!



4 0
3 years ago
Which of these numbers equals-6*(-1/2) ?<br> A. -3<br> B. -2<br> C. 2<br> D. 3
solmaris [256]

Answer:

D. 3

Step-by-step explanation:

8 0
2 years ago
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