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Komok [63]
3 years ago
7

The Pyramids of Egypt need to be repaired but first we must find the total Volume so we know how many bricks to buy. This Pyrami

d has a height of 6 km, a length of 10 km and a width of 10 km. 6 km 10 km ?​
Mathematics
1 answer:
Agata [3.3K]3 years ago
6 0

Answer:

Hi how are you doing today Jasmine

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Which calculation should be used to calculate s9 for the arithmetic sequence an=3n-1
Ganezh [65]

Answer: Choice A

S9 = (9/2)*(2+26)

===============================================

The formula is

Sn = (n/2)*(a1+an)

where

Sn = sum of the first n terms (nth partial sum)

n = number of terms

a1 = first term

an = nth term

In this case,

n = 9

a1 = 2 (plug in n = 1 into the formula an = 3n-1 and simplify)

an = a9 = 26 (plug n = 9 into the formula an = 3n-1 and simplify)

So,

Sn = (n/2)*(a1+an)

S9 = (9/2)*(2+26)

will help us find the sum of the first 9 terms of this arithmetic sequence

7 0
3 years ago
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What inequality is less than 8
Fofino [41]

Answer:

<em>Hope the link helps! Sorry I didn't explain. I couldn't find the less than sign. </em>

8 0
3 years ago
What is a formula that can be used to find the area of one triangular section of the door? How do you know the formula will work
adoni [48]

Answer:

Area Of a Right Angled∆

=><em><u> </u></em><em><u>1</u></em><em><u>/</u></em><em><u>2</u></em><em><u> </u></em><em><u>x </u></em><em><u>Base </u></em><em><u>x </u></em><em><u>Height</u></em>

Area of a ∆ Using Heron's Formula

=>

\sqrt{s(s - a)(s - b)( s-c )}

Where

  • S = Semiperimeter
  • a ,b& c = sides of the ∆
3 0
3 years ago
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An online file storage site offers a payment plan where users
lozanna [386]

Answer:   95.40

Step-by-step explanation:

7.95*12=95.40

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3 years ago
Emily needs to buy 3 binders and 5 notebooks for school.
lubasha [3.4K]

Answer:

3b+5b=total

Step-by-step explanation:

you didnt put enough information ( the cost of the stuff)

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3 years ago
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