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Pavel [41]
3 years ago
6

Given A = {a, b, c}, how many subsets does A have including ∅? a. 4 b. 7 c. 8

Mathematics
1 answer:
djverab [1.8K]3 years ago
8 0
A set of n elements has 2^n subsets.

There are 3 elements in the set A, so the number of subsets is 2^3=8

You can write them out:
\{\{\}, \{a\}, \{b\}, \{c\}, \{a, b\}, \{a, c\}, \{b, c\}, \{a, b, c\}\}
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I need an explantion on this question
svlad2 [7]
Y= -x + 2 and y= 3x - 4
As these both equal y, you know that they both equal each other so
-x + 2 = 3x - 4
Third option :)
5 0
2 years ago
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An eccentric philanthropist undertakes to give away $100,000. He is eccentric because he insists that each of his gifts be a num
gavmur [86]

Answer:

Step-by-step explanation:

An eccentric philanthropist undertakes to give away $100,000. He is eccentric because he insists that each of his gifts be a number of dollars that is a power of two, and he will give no more than one gift of any amount. How does he distribute the money?

To solve this problem, we will simply write 1,00,000 in base 2.

2^17 gives 131072, 2^16 gives 65536.

So, the first gift is 65536, we then need to repeat this process for  34,464 ((100,000-65536 = 34,464), to get all gifts in succession.

6 gifts in all: one each of $32, $128, $512, $1024, $32768, and $65536.

3 0
3 years ago
How do i do this problem 0.25(x+4)-3=28
KiRa [710]
Distribute the .25 to get .25x + 1 - 3 = 28

Then simplify to get .25x - 2 = 28

Move the two to the right to get .25x = 30

Then divide to leave x: 30 / .25 = 120

X = 120
6 0
3 years ago
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Drew’s score on a math text was 92.He could earn an extra 1/2 point for each incorrect problem he corrected. Drew corrected 3 pr
svp [43]

Answer:

Point S represent the score 93.5 which is Drew's New Score.

Step-by-step explanation:

The score of Drew on a math test = 92

Point for each correction in the math test = 1/2  = 0.5

Now, the number of problems corrected = 3 x 0.5 = 1.5

So, Now, the new scale of Drew =  Old Score + The Correction Score

                                                       = 92  +  1.5

                                                       = 93.5

or, Drew, new score = 93.5

Hence, point S represent the score 93.5 which is Drew's New Score.

8 0
2 years ago
Can you help me with my Math, please?
creativ13 [48]
The first poster is not an accurate representation of the painting, but the second poster is an accurate representation because the ratio between the first and original lengths did not equal the ratio between the first and original widths but the second poster's ratios were equal.
6 0
3 years ago
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