The solution is x= 3 and y = 1
Step-by-step explanation:
Given equations are:
From equation 1:
Putting in equation 2:
Dividing both sides by -9
Putting y = 1 in equation 1:
Hence,
The solution is x= 3 and y = 1
Keywords: Linear equations, polynomials
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Descartes' rule of signs tells you the one sign change in the coefficients means there's one positive real root. If you change the sign of the odd-power terms, the signs become -++-, so have two sign changes. This means there are 0 or 2 negative real roots.
A graph shows there to be 3 real roots, two of which are negative. Thus there are no complex roots.
Answer:
y = -1/3x -3
Step-by-step explanation:
-2x - 6y = 18
We want to solve for y since the slope intercept form is y =mx+b where m is the slope and b is the y intercept
Add 2x to each side
-2x-6y +2x = 2x+18
-6y = 2x+18
Divide each side by -6
-6y/-6 = 2x/-6 + 18/-6
y = -1/3x -3
This is in slope intercept form with the slope -1/3 and the y intercept -3
Make sure you remember to use the distributive property, and enter your x and y values into the equation.
-8( x - 3y)
-8(-2 - 3(-4))
-8(-2) + -8(12)
16 + (-96) (or 16 - 96)
= -80
Hope this helps!
Answer:
1/9
Step-by-step explanation:
Separate the fraction (1/9) from the variable x:
y = (1/9)x.
1/9 is the constant of proportionality.
