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dolphi86 [110]
3 years ago
11

Another sigma notation question. Please check. Hopefully I did this one correctly!

Mathematics
1 answer:
Neko [114]3 years ago
8 0

Answer:

Your answer is correct.  The series is a geometric series with common ratio -1/4 and first term 40.  So each term is:

an = 40 (-1/4)^(n−1)

So the sum of the first 10 terms is:

∑(n=1 to 10) [ 40 (-1/4)^(n−1) ]

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9.45 = 28.2 can you answer
mixas84 [53]

Answer:

9.45<em>g</em><em>=</em><em> </em>28.2

Divide through by 9.45

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>g</em><em>=</em><em>2</em><em>8</em><em>.</em><em>2</em><em>/</em><em>9</em><em>.</em><em>4</em><em>5</em>

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8 0
3 years ago
Read 2 more answers
A full-service salon charges $15.00 for a haircut and $0.45 per hair roller used in a perm. What is the minimum number of hair r
IrinaK [193]

Answer:

43 hair rollers.

Step-by-step explanation:

The cost of the haircut ($15.00) and the hair rollers (0.45*43) would equal $34.35, just passing the minimum amount of $34.00.

6 0
3 years ago
Solve these plz<br>10 points for these plz solve<br>​
eimsori [14]

Answer:

LCM of 18 and 20= 2

LCM of 45 and 72=9

HCM of 24 and 36=12

Step-by-step explanation:

4 0
3 years ago
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The glass fish tank does not have a cover. Find the total area of the glass panels used to make the tank.
pogonyaev
You will find the area of the 5 surfaces made of glass. There is a front, back, 2 sides, and the bottom. Each face is in the shape of a rectangle, so you will multiply the length by the width.
1. Front- 24 x 27 =648
Back-24 x 27 = 648
2. Side- 21 x 27 =567
Side - 21 x 27 = 567
3. Bottom - 21 x 24 = 504

Add all these together for your total amount of glass needed. The answer is 2934 square cm of glass.
6 0
4 years ago
Read 2 more answers
Write x² - 6x + 3 in the form (x-a)²+ b.​
zheka24 [161]

Answer:

(x + 3)² - 12

Step-by-step explanation:

x²+6x-3

=  x²+ 6x + 9 - 12

= (x + 3)² - 12

7 0
3 years ago
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