Answer:
9.58
Step-by-step explanation:
The quadratic equation

can be written in the form:

Where p and q are the roots of the equation.
Given p = 4, q = -2, a = 3, the quadratic will look like this:

Finally, distribute and combine like terms to put it in standard form.
From the second:
2x-y=4
x=(4+y)/2 and applying this to first:
4+y+3y=12
4y+4=12
4y=8
y=2 and since x=(4+y)/2, x=3 so
x+y=2+3=5
Answer:
4(x+7)
or 4x+28
Step-by-step explanation:
Here you go:)
2.50$ is the better deal. If you times 0.70$ to 5 it is 3.5$ which is more expensive