Substitution is where you solve for one of the variables and then plug that in for the same variable in the other equation. Here, there is already an equation that is solved for a variable,
. So we can plug in '4x - 11' for 'y' in the other equation:
Distribute 5 into the parenthesis(multiply it to every term in the parenthesis):
Your answer is
C.
we have (-3,10) and (7,4), then
After using substitution, x= -3/2 and y=-5/2 should be your answer.
Answer:
B)
Step-by-step explanation:
We are given,
The graph of the parabola opens downwards.
This means that the leading co-efficient of the function will be negative.
So, options C and D are not possible.
Moreover, it is given that the graph cuts x-axis near i.e. = 1.5 and i.e. = 4.5.
i.e. At y=0, the value of x is near and .
A. So, in , we put y =0.
i.e.
i.e.
i.e. x = 0.68 and x = 3.41
We see that this does not crosses the x-axis at the given points.
So, option A is wrong.
B. Also, in , we put y =0.
i.e.
i.e.
i.e. x = 1.68 and x = 4.41.
Thus, this equation cuts the x-axis near the given points i.e. 1.5 and 4.5.
Hence, the equation of the given graph is .