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blagie [28]
4 years ago
15

Evaluate 12sigma n=3 20(0.5)^n-1

Mathematics
1 answer:
seropon [69]4 years ago
5 0
For the same reasons as the last problem...

s(n)=20(1-(1/2)^n)/(1-1/2)

s(n)=40(1-(1/2)^n)

But this time we are not starting at one so we must subtract the sum of s(2) from the sum of s(12) so:

40((1-(1/2)^12-(1-(1/2)^2)

40(0.249755859375)

≈9.99  (to nearest one-thousandth)
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Which number is an integer? 1, 0.5, 3/2
aksik [14]

An integer is any whole number (not fractions) that can be either negative or positive.

1 is the only integer because 0.5 and 3/2 are not whole numbers and are fractions, while 1 is a whole number.

7 0
3 years ago
Question 5 (1 point)
bearhunter [10]

Answer:

T(x)=84-2x

Step-by-step explanation:

Linear Modeling

The initial temperature outside is 84 degrees.

We are told the temperature drops 2 degrees every hour.

Let's call x to the number of hours elapsed. After x hours, the temperature would have dropped by 2x degrees, since it's a rate of 2 degrees per hour.

That drop is subtracted from the initial temperature to produce the linear model as follows:

\mathbf{T(x)=84-2x}

This is the linear equation that represents the described situation.

5 0
3 years ago
Please help!! (no links)
attashe74 [19]

Answer:

3/32

Step-by-step explanation:

The first question should be 3/8 as there are 3 "1"s on the spinner. The answer to the last one is "3/32". You take the 3/8 chances to get a one and multiply that by 1/4 to get a "B". Once you multiply you get .09375 which is 3/32 when converted. Please let me know if this is incorrect.

5 0
3 years ago
|x| = -5 <br><br> Select a he graph of the solution. Click until correct graph appears
Gnoma [55]

Answer:

No solution

Step-by-step explanation:

No solution.  

You could graph y = |x| and then graph y = -5.  You'd see quickly that these two graphs never intersect.

The absolute value function y = |x| can only be zero (0) or positive.

5 0
3 years ago
1. Alternate interior angles theorem; 2.
abruzzese [7]

m∠KLF + m∠BKL = 180° (definition of supplementary angles)

Also:

m∠KLF + m∠BKL = m∠BKL + m∠AKL(substitution property)

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

An angle is formed from the intersection of two or more lines. Types of angles are acute, obtuse and scalene.

From the image:

m∠KLF + m∠BKL = 180° (definition of supplementary angles)

Also:

m∠KLF + m∠BKL = m∠BKL + m∠AKL(substitution property)

Find out more on equation at: brainly.com/question/2972832

#SPJ1

4 0
2 years ago
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