-x + y = 1 -7x + 6y = -1 use substitution to solve
2 answers:
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Answer:
The discriminant is -7
Step-by-step explanation:
The discriminant of a quadratic function/equation(ax^2+bx+c = 0) is calculated as:
Here
b is the co-efficient of x
a is the co-efficient of x^2
and c is the constant
Given equation is:
Here
a = -2
b = 5
c = -4
Putting the values in the formula for discriminant
As the discriminant is negative, the equation has no real solution.
Hence,
The discriminant is -7
Answer:
Step-by-step explanation:
The equation for slope is:
We can substitute the given coordinates into the equation:
The slope is -3
The equation for a line is:
m: slope
b: y-intercept
x, y: (x, y) coordinate pair
Now, plug in the slope and one of the (x, y) coordinate pairs to solve for the y-intercept.
Therefore the equation is:
Answer:
Step-by-step explanation:
y = –⁷⁄₉x + 5
+ ⁷⁄₉x + ⁷⁄₉x
___________
⁷⁄₉x + y = 5 [We CANNOT leave the equation like this, so multiply by 9 to eradicate the fraction.]
9[⁷⁄₉x + y = 5]
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