The solution to the system of equations is x = 30 and y = -36.
The two equations are known as simultaneous equations. The elimination method would be used to determine to find the solutions.
−3x−9y=18 equation 1
4x+3y=12 equation 2
In order to determine the value of x, take the following steps;
Multiply equation 2 by 3
12x + 9y = 36 equation 2
Add equation 1 and equation 2
x = 30
Substitute for x in equation 2
4(30) + 3y = 12
120 + 3y = 12
120 - 12 = -3y
108 = -3y
y = 108 / -3 = -36
To learn more about simultaneous equations, please check: brainly.com/question/25875552
This apparent contradiction between the chlorine ion and the sodium ion is; due to electrostatic attraction between the nucleus and the electrons.
As we know, there's a periodic trend for atomic radii in the periodic table; the trend is as follows;
- <em>Atomic radius increases down a group and reduces across the period.</em>
Elements get larger down the group and this explains the trend down a group.
- However, atomic radius decreases across a period because the more Valence electrons there are in an element, the more the electrostatic attraction between the positively charged nucleus and the negatively charged electrons.
Consequently, when Chlorine forms an ion by gaining an electron, the electrostatic attraction between its nucleus and electrons increases and the the atomic radius decreases.
On the other hand, when sodium forms an ion by losing an electron, the electrostatic attraction between its nucleus and electrons decreases and the the atomic radius increases.
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Answer:
Equation which can be used to find the number of weekly payments w
is 300 = 60 + 3 w.
Step-by-step explanation:
Here, the selling price of the TV =$300
The initial TV payment = $60
Per week payment of TV = $30
The number of weeks, the payment is made = w
So, the amount paid for TV in w weeks = w x ( Payment in 1 week)
= w x ( $30) = 30 w
So, The total SP of TV = Initial Payment + Payment made in w weeks
⇒ 300 = 60 + 3w
Hence, equation which can be used to find the number of weekly
payments w is 300 = 60 + 3 w.
Hey friend!
You stuck?
There are two inner planets that have no moon. Mercury, and Venus. Only Mercury has hardly any atmosphere. Therefore, Planet A is Mercury. Venus which is composed primarily of carbon dioxide with a small amount of nitrogen is considered a planet with a dense atmosphere. Therefore, Planet B is Venus.
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