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DedPeter [7]
3 years ago
10

Please Answer this! 65 + _____ − 15 = 65 a −b +b = _____ C-D+D=_ Please explain too

Mathematics
1 answer:
yan [13]3 years ago
4 0

Answer:

15

Step-by-step explanation:

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This is a pre calculus question that I need help with, serious answer PLEASE and thank you! Will give brainliest.
IRISSAK [1]

The wording of this question is a bit confusing... You can't write a sequence in sigma notation, but rather a series or sum. I think the question is asking you to write the sum of the sequence,

\dfrac12,\dfrac14,\dfrac18,\ldots,\dfrac1{64}

which would be

\dfrac12+\dfrac14+\dfrac18+\cdots+\dfrac1{64}

in sigma notation.

To do this, notice that the denominator in each term is a power of 2, starting with 2^1=2 and ending with 2^6=64. So in sigma notation, this series is

\displaystyle\sum_{n=1}^6\frac1{2^n}

4 0
3 years ago
Perform the indicated operation.<br><br> (-50) ÷ (-2)<br><br> 48<br> -48<br> -25<br> 25
mezya [45]

Answer:

25

Step-by-step explanation:

Remember that multiplication and division will result in a positive number if no or two negative signs are present. So here, you ignore the negative signs.

All you really have to do is divide 50 by 2, which results in 25.

7 0
3 years ago
Read 2 more answers
For each part below, use
Law Incorporation [45]

Answer:

a.) 70*

b.) 60*

Step-by-step explanation:

a.) An isosceles triangle has two angles that are equal. The one other angle is 40*, meaning you have to subtract that from 180 and then divide by 2.

b.) An equilateral triangle has three equal angles. Divide 180 by 3.

8 0
2 years ago
Read 2 more answers
Samantha is making goodie bags for a birthday party. She puts 2 slices of pie in each goodie bag. Her sister then puts an equal
Diano4ka-milaya [45]
5 goodie bags
25 pies
25/2= 12.5
12.5=2.5
The answer varies if you choices are whole numbers or fraction, right now it would be 2 and a half pies but it could change if they are asking for a whole number
7 0
2 years ago
I need help I dont know about fractions
Len [333]

Answer:

A. 3 1/24

B. 7/12

C. 3 13/15

D. 1 1/8

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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