16 I think could be wrong
Answer:
-9/20
Step-by-step explanation:
For the first two terms, all you have to do is multiply the numerators and the denominators, and cancel out the negative, but because there is a -1 after that, the negative sign comes back, although the -1 doesn't really change the number.
1. A parabola is the graph of the function
(0, 15 ) is a point of this parabola, so
So c=15, which means we decrease the number of unknowns and write again:
2. Now, since (4, -1) is another point in the parabola:
16a+4b=-16
dividing by 4:
4a+b=-4
We also know that -b/2a gives the x-coordinate of the vertex:
-b/2a=4
-b=8a
b=-8a
Substitute b=-8a in 4a+b=-4,
we get 4a-8a=-4
-4a=-4
a=1, then b=-8
So y=f(x)=x^2-8x+15
The roots of the expression, which are the x-intercepts can be found by solving the equation:
solution 1: x-4=1, x=5
solution 2: x-4=-1, x=3
The x-intercepts are (3, 0) and (5, 0)
Answer:
4b this is the correct answer yes
Answer:
Line y = −x + 4 intersects the line y = 3x + 3.
Step-by-step explanation:
Please Help! Which description best describes the solution to the following system of equations?
y = −x + 4
y = 3x + 3
Line y = −x + 4 intersects the line y = 3x + 3.
This is the response because the solution to a system of two equations is represented by the intersection of the equations of the two lines/curves.
Lines y = −x + 4 and y = 3x + 3 intersect the x-axis.
Lines y = −x + 4 and y = 3x + 3 intersect the y-axis.
Line y = −x + 4 intersects the origin.