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ruslelena [56]
3 years ago
15

PLEASEE HELP!! <3 100 POINTSS

Mathematics
2 answers:
iris [78.8K]3 years ago
6 0

To tell isf a table is proportional, divide y by x,

if all sets are the same it is proportional.

First table:

3 / -3 = -1

2 / -4 = -2


-1 and -2 are not the same


Table 2:

1/-1 = -1

3/-3 = -1

5/-5 = -1


These are all the same.


Table 2 is correct.

liraira [26]3 years ago
3 0

To find porportionality, you must note that: the x and y must have the same value throughout the table when multiplied.

For example:

x     |    y

------------

1     |   2

2    |   4

etc.

In this case, it is multiplied by 2. Now let us look at the problem

---------------------------------------------------------------------------------------------------------------------------

Table 2 is your answer because, you are multiplying -1 each time

x(-1) = y   is your equation

To check, plug in the x, and see if the y is the same value

(-1)(-1) = 1 (True)

(-3)(-1) = 3 (True)

(-5)(-1) = 5 (True)

---------------------------------------------------------------------------------------------------------------------------

hope this helps

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FrozenT [24]

Answer:

k = 10

Step-by-step explanation:

The sum of k terms of a geometric sequence with first term a1 and common ratio r is given by ...

... Sk = a1·(1 -r^k)/(1 -r)

For the given numbers, this is ...

... 118096 = 78732·(1 -(1/3)^k)/(1 -1/3)

Manipulating this to get the term containing k, we have

... 1 -(2/3)(118096/78732) = (1/3)^k

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Taking logarithms, we get

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3 years ago
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Answer:

4.56, 4,65, 5,46, 5.64, 6.45 and 6.54

Step-by-step explanation:

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4 0
3 years ago
A molecule of sodium carbonate contains 2 atoms of sodium to every 3 atoms of oxygen. Could a compound containing 12 atoms of so
artcher [175]

Answer:

No, a compound containing 12 atoms of sodium and 15 atoms of oxygen could not be sodium carbonate. When its ratio of atoms is reduced to the lowest terms, it is not the same as sodium carbonate. 4:5 ≠ 2:3

Step-by-step explanation:

Use ratios to solve this problem.

In sodium carbonate, the ratio for the number of atoms for sodium to oxygen (sodium:oxygen) is 2:3.

Check if the ratio for the compound with the ratio 12:15 is equal to 2:3.

Reduce the ratio 12:15 to lowest terms, just like how you would reduce a fraction. Find the GCF (greatest common factor). The left and right sides are both divisible by 3.

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15/3 = 5

The ratio in the compound is 4:5.

4:5 ≠ 2:3

Since the ratios are not the same, the compound is not sodium carbonate.

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Step-by-step explanation:

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