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miss Akunina [59]
3 years ago
15

Which of the following sets is not finite?

Mathematics
1 answer:
Alja [10]3 years ago
8 0
\{x|x\in\mathbb{N}\ \wedge\ n < 10\}=\{0;\ 1;\ 2;\ 3;\ 4;\ 5;\ 6;\ 7;\ 8;\ 9\}-FINITE\\\\\{x|x\in\mathbb{Z}\ \wedge\ 0 < x < 10\}=\{1;\ 2;\ 3;\ 4;\ 5;\ 6;\ 7;\ 8;\ 9\}-FINITE\\\\\{x|x\in\mathbb{Z}\ \wedge\ x < 0\}=\{...;-4;-3;-2;-1\}=\mathbb{Z}^--NOT\ FINITE
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The solution of the system of equations Ax+y=5 and Ax+By=20 is (2,-3). What are the values of A and B
STatiana [176]

Answer:

  • A = 4
  • B = -4

Step-by-step explanation:

Put the values of x and y in the equations and solve the resulting system.

  A(2) +(-3) = 5

  A(2) +B(-3) = 20

__

The first equation tells the value of A:

  2A = 8 . . . . add 3

  A = 4 . . . . . .divide by 2

This and the second equation tells the value of B:

  (4)(2) -3B = 20

  -3B = 12 . . . . . subtract 8

  B = -4 . . . . . . . divide by -3

The values of A and B are 4 and -4, respectively.

6 0
3 years ago
Help please ! whoever answers correctly gets brainliest :)
musickatia [10]

Answer:

1: proportional

2: non-proportional

3: non-proportional

4: non-proportional

5: proportional

6: proportional

7: non-proportional

8: proportional

9. proportional.

10. proportional.

11. non-proportional.

12. proportional.

Step-by-step explanation:

I'm unsure how the proportional ones are actually calculated depending if it requires a dot on the exact origin, but depending on what I can graphically view and assume; every graph with the line running through the origin is proportional and every graph where the line does not run through the origin is non-proportional.

7 0
3 years ago
Read 2 more answers
What is the x- coordinate of the zero of the graphed line?
topjm [15]

Answer:

4

Step-by-step explanation:

8 0
3 years ago
The Perimeter or a regular pentagon is 41.5cm. Write and solve an equation to determine the length of each side of the pentagon
olchik [2.2K]

Answer:

8.3 cm

Step-by-step explanation:

So a pentagon has 5 equal sides, and the perimeter is the distance around a figure. Because we know the perimeter is 41.5 centimeters, we just divide that number by 5.

Perimeter (P) = s+s+s+s+s (sides)

P: 41.5 cm ÷ 5 =

8.3 cm

We know this is correct because:

8.3 + 8.3 + 8.3 + 8.3 + 8.3 = 41.5

Hope this helps!

4 0
3 years ago
You are going to your first school dance! You bring $20,
poizon [28]

Answer:

10

Step-by-step explanation:

Let the no. of sodas be x

Price of each soda = $2

Therefore, no . of sodas you can buy = $2x

2x=20

=>x=\frac{20}{2}

=>x=10

you can buy 10 sodas

5 0
3 years ago
Read 2 more answers
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