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Natasha2012 [34]
2 years ago
14

How would this series be written in sigma notation?2 - 3 + 4 -5 +... - (2n+1)?​

Mathematics
1 answer:
Yakvenalex [24]2 years ago
8 0

Answer:

i dont know i need points

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What does the quotiant 35/x represent?
Bumek [7]
When 35 ÷ 7, the quotient would be 5, while 35 would be called the dividend, and 7, the divisor. I hope this helps
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What is the difference of 85.23 and 2.675?
Norma-Jean [14]

Answer: 82.555

Step-by-step explanation: I used a calculator

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3 years ago
What is the volume of a sphere with a radius of 9 inches
nata0808 [166]
4/3 *pie *9*9*9=972pie
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Read 2 more answers
Please help i need help geometry is very hard for me i am dumb
stiks02 [169]

Answer:

G.  ABD = 74

H.  DBC = 206

I.  XYW = 33.75

J.  WYZ = 46.25

Step-by-step explanation:

For G and H: You have a straight line (ABC) with another line coming off of it, creating two angles (ABD and DBC).  A straight line has an angle of 180 degrees.  This means that the two angles from the straight line when combined will give you 180 degrees.  Solve for x.

ABD + DBC = ABC

(1/2x + 20) + (2x - 10) = 180

1/2x + 20 + 2x - 10 = 180

5/2x + 10 = 180

5/2x = 170

x = 108

Now that you have x, you can solve for each angle.

ABD = 1/2x + 20

ABD = 1/2(108) + 20

ABD = 54 + 20

ABD = 74

DBC = 2x - 10

DBC = 2(108) - 10

DBC = 216 - 10

DBC = 206

For I and J:  For these problems, you use the same concept as before.  You have a right angle (XYZ) that has within it two other angles (XYW and WYZ).  A right angle has 90 degrees. Combine the two unknown angles and set it equal to the right angle.  Solve for x.

XYW + WYZ = XYZ

(1 1/4x - 10) + (3/4x + 20) = 90

1 1/4x - 10 + 3/4x + 20 = 90

2x + 20 = 90

2x = 70

x = 35

Plug x into the angle values and solve.

XYW = 1 1/4x - 10

XYW = 1 1/4(35) - 10

XYW = 43.75 - 10

XYW = 33.75

WYZ = 3/4x + 20

WYZ = 3/4(35) + 20

WYZ = 26.25 + 20

WYZ = 46.25

3 0
3 years ago
Please help?<br>:):):):)​
Citrus2011 [14]

Answer:

6.48%

Step-by-step explanation:

t - c = b

t = 31.93

c = 29.99

b = 31.93 - 29.99

b = 6.48%

4 0
3 years ago
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