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romanna [79]
3 years ago
12

What's -7 x 7/3 in a fraction

Mathematics
1 answer:
avanturin [10]3 years ago
3 0
It should be be cause -7 time 7 is -49 over 3 -49/3
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Let Z={a,c,{a,b}}. What is |Z|?
Lina20 [59]

Z=\{a,c,\{a,b\}\}

\boxed{|Z|=3} (treat \{a,b\} as one element of Z)

The power set of Z is

\boxed{2^Z=\bigg\{\{\},\{a\},\{c\},\big\{\{a,b\}\big\},\{a,c\},\big\{a,\{a,b\}\big\},\big\{c,\{a,b\}\big\},\big\{a,c,\{a,b\}\big\}\bigg\}}

1. \{a,c\}\subseteq Z is true because both a\in Z and c\in Z.

2. a\in Z is true.

3. \{c\}\subseteq Z is true (same reason as part 1).

4. \{c\}\in Z is false because Z does not contain the set \{c\}, rather just the element c itself.

5. b\in Z is false because the element b on its own simply is not in Z. That b\in\{a,b\} does not mean b\in Z, but that b belongs to a subset of Z.

6. \{a,b\}\in Z is true.

6 0
4 years ago
PLEASE HELP ME I WILL REWARD YOU BRAINLIEST: find the slope of the line through each pair of points <img src="https://tex.z-dn.n
son4ous [18]

Answer:

The slope of a line can be positive, negative, zero, or undefined. A horizontal line has slope zero since it does not rise vertically (i.e. y1 − y2 = 0), while a vertical line has undefined slope since it does not run horizontally (i.e. x1 − x2 = 0).

Step-by-step explanation:

i googled it

6 0
3 years ago
How can i round the numder 6,438,593 to nerest 1,000?
NeTakaya
6439000 is the nearest 1000
3 0
4 years ago
Find the quotient 1377÷8
Over [174]

Answer:  172 \frac{1}{8}

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Need help pleaseeeee
saw5 [17]

Answer:

≈ 130.2 cm²

Step-by-step explanation:

A = 8×10 + π·r²

= 80 + 3.14×16

= 80 + 50.24

= 130.24

≈ 130.2 cm²

7 0
3 years ago
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