Answer:
to examine the ratio y/x (instead of x/y). If the x and y coordinates form proportional relationships, then there is some non-changing number (a constant) that when multiplied times x will create y. In this example, that number is 3 (y = 3x), and is called the constant of proportionality.
Step-by-step explanation:
First, multiply the first equation by 2.
That turns the first equation into:
6x - 2y = 18
That way it can easily be added to the second equation:
6x - 2y = 16
x + 2y = 5
---------------
7x = 21
==========
As you can see, the y disappeared, which was the objective of this operation.
Now the equations can be solved easily:
7x = 21
x = 3
Insert x=3 in the original equation:
3*3 - y = 8
9 - y = 8
9 = 8 + y
y = 1
So the result is:
x = 3
y = 1
6 1/2% as a decimal is 6.05. 6 is a whole number, and 1/2% is 0.05 in decimal form.
The
amount of interest earned from a specific investment can be calculated by
multiplying the principal amount with the decimal equivalent of the given
percentage or interest rate. That is,
<span> I = P x i</span>
Substituting
the known values,
<span> I = ($580)(0.615)</span>
<span> I = $356.7</span>
<span>Answer:
$356.7</span>
Simple, just do 9 - 5, Kona has 4 rock crystals. are you new to math?
