Given:
The slope of the line is 3.
The line passes through the point (2,-1).
To find:
The equation of the line.
Solution:
Point slope form of a line: If a line passes through the point with slope m, then the equation of the line is
The line passes through the point (2,-1) with slope 3. So, the equation of the line is
Therefore, the required equation is . Hence, all the options are incorrect.
A)
The discriminant (radicand) is √(b^2-4ac), let us call this "d" for the discriminant.
If:
d<0, there are no real solutions (though there are two imaginary ones)
d=0, there is one real solution
d>0, there are two real solutions.
In this case, d=12^2-4(4)9
d=144-144
d=0
So there is one real solution.
B)
9x^2-30x+25=0
9x^2-15x-15x+25=0
3x(3x-5)-5(3x-5)=0
(3x-5)(3x-5)=0
(3x-5)^2=0
x=5/3
x=1 2/3
Answer:
The answer is -54. Please mark as brainliest :)
Step-by-step explanation:
Y is directly proportional to x. So....
<h3>Finding the value of constant k.</h3>
y=kx
6=-2k
-3=k.
<h3>Finding y when x is 18</h3>
y=-3*18
y=-54.