Two different things u can do
Substitution:
X-9y=12
+9y +9y
X=9y+12
-3(9y+12)+9y=36
-27y-36+9y=36
+36 +36
-18y = 72
/-18 /-18
Y = -4
Or whatever this other I’ve is called
-3x-9y=36
-1(X-9y)=(12)-1
-3x-9y=36
-x+9y=-12
-4x=24
X= -6
Answer:
Marsha would make 5280 in intrest over two years.
Not sure how you can substiture the values into the equation
Step-by-step explanation:
explanation
Answer:
<h2><u><em>
66,130</em></u></h2>
I just guessed random numbers until I got 66 and 130.
We have the equation:

By arranging this equation in terms of x and y, we have:

By using the method of completing the square, we have:

The center of this circle is:

So the equation that fulfills the statement is:

Finally, the right answer is c)
Doug because his sequence follows a rule of multiplying by -1/2
Hope I got it right for your sake.