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kupik [55]
3 years ago
15

If Sn=2^n-1what's the expression ofSn-1?​

Mathematics
1 answer:
Naya [18.7K]3 years ago
4 0

Answer:

S(n-1)=2^{n-2}

Step-by-step explanation:

Given that,

The value of S_n=2^{n-1}

We need to find an expression for S(n-1). To find it, put the value of n as (n-1). So,

S_{n-1}=2^{n-1-1}\\\\=2^{n-2}

Hence, the value of S(n-1) is equal to 2^{n-2}.

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Find the distance represented by 4.9 inches if 1 inch = 50 miles.
pishuonlain [190]

Answer:

245 miles

Step-by-step explanation:

To complete this, you want to use the unit conversion technique in fraction form. The units for the numerator of the first fraction (thing you want to convert) should match the units of the denominator in the multiplying fraction.

8 0
3 years ago
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three friends go to the movies and split the total cost between them. the total cost is $13.05 for movie tickets and $10.26 for
lakkis [162]
Total cost = $13.05 + 10.26
= $23.31
Indivdual pay = $23.31 / 3
= $7.77 each
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3 years ago
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The arnold family arrived at the beach at 10:30 a.m. The spent 3 3/4 hours there. what time did they leave the beach?
Dennis_Churaev [7]
2:15 was the time they left the beach
4 0
3 years ago
I think the answer is 38 degrees I just want someone to check if I am right please!
Aleksandr [31]

Answer:

JML = 142

Step-by-step explanation:

Sadly that is wrong.  Not all the angles are the same.  However, using the reflexive property we can find that angle JKM is 38 degrees.  Using this, we need to create an equation to get the other two angles.  Again, they would be the same because of the reflexive property.

38 + 38 + x + x = 360

The total needs to be 360 because the shape has 4 sides.

76+x^{2} =360

Now you beed to get the variable to one side.  To do this you would subtract each side by 76.

x^{2} =284

Finally, your answer currently shows the sum of both LKJ and JML.  to get one sides angle just divide by 2.

284 / 2 = 142

JML = 142

There is your answer.

Hope this helped.

4 0
3 years ago
Orly uses 2 cups of raisins for every 12 cups of trail mix she makes. How many cups of trail mix will she make if she uses 8 cup
alexgriva [62]

Answer:

48

Step-by-step explanation:

8 divided by 2 = 4

4 times 12 = 48

5 0
3 years ago
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