Answer:
-2.1
Step-by-step explanation:
Answer:
Step-by-step explanation:
Let number of hours be x
<u>Lakeshore paddle cost:</u>
<u>Lake paddle cost:</u>
<u>Required inequality:</u>
- 10x + 4 < 12x
- 12x - 10x > 4
- 2x > 4
- x > 2
Lakeshore paddle costs less when time of rent is greater than 2 hours
Answer:
f= x^2+4x−12
/x
Step-by-step explanation:
Step 1: Divide both sides by x.
fx
/x = x^2+4x−12
/x
f= x^2+4x−12
/x
In a quadratic function you square x so I'd assume that's what they want.
That means the values of f(x) would be:
9
1
1
9
25
"Completing the square" is the process used to derive the quadratic formula for the general quadratic ax^2+bx+c=0. Suppose you did not know the value of a,b, or c of the quadratic...
ax^2+bx+c=0 You need a leading coefficient of one for the process to work, so you divide the whole equation by a
x^2+bx/a+c/a=0 now you move the constant to the other side of the equation
x^2+bx/a=-c/a now you halve the linear coefficient, square that, then add that value to both sides, ie, (b/(2a))^2=b^2/(4a^2)...
x^2+bx/a+b^2/(4a^2)=b^2/(4a^2)-c/a now the left side is a perfect square...
(x+b/(2a))^2=(b^2-4ac)/(4a^2) now take the square root of both sides
x+b/(2a)=±√(b^2-4ac)/(2a) now subtract b/(2a) from both sides
x=(-b±√(b^2-4ac))/(2a)
It is actually much simpler keeping track of everything when using known values for a,b, and c, but the above explains the actual process used to create the quadratic formula, which the above solution is. :)
