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bazaltina [42]
3 years ago
14

Find the sum of the first 40 terms of the series -1+1+5+13+....​

Mathematics
1 answer:
Gnesinka [82]3 years ago
5 0

Answer:

2^41-122

Step-by-step explanation:

-120 in total as each term is 3 less than a power of 2

Starts at power of 1 will end on 40

adding consecutive powers will give 2 less than the next power

2^(40+1)-120-2

2^41-122

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4 years ago
Airplane is flying at 9000 feet.It begins descending at a rate of 500 feet per minutes write an equation
Hunter-Best [27]

Answer:

9000 - 500m

Step-by-step explanation:

Your original number is 9000. It starts to decrease at a rate of 500 feet per minute. So we know that you will subtract 500 from 9000 but we don't know how many times. Because of this, we will put a variable to represent the minutes that we are descending.

In conclusion: 9000 - 500m

7 0
4 years ago
I'm trying to find 1, 2, & 3 but idk how? Sry if it's sideways I'm new ​
Vedmedyk [2.9K]

Answer:

Step-by-step explanation:

m∠1+∠2=180

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x=2y-40

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2y+y=50+40

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6 0
3 years ago
Solve the following new equation
mixer [17]

Answer:

<h3>x = 1.54 or x = - 4.54 to 2 decimal places</h3>

Step-by-step explanation:

x² + 3x - 7 = 0

Using the quadratic formula

a = 1 b = 3 c = - 7

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Hope this helps you

7 0
3 years ago
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