Answer:
x=3z+5
/z^2
Step-by-step explanation:
Let's solve for x.
xz^2−3z−5=0
Step 1: Add 5 to both sides.
xz^2−3z−5+5=0+5
xz^2−3z=5
Step 2: Add 3z to both sides.
xz^2−3z+3z=5+3z
xz^2=3z+5
Step 3: Divide both sides by z^2.
xz^2
/z^2
=
3z+5/
z^2
x=
3z+5
/z^2
Answer:
x=3z+5
/z^2
(/ means over )
4x-2y=8 ==> y=2x-4 (to better show you what I mean)
2 lines are parallel if they have the same slope (m the coefficient of x).
So y=mx + b // y =2x-4 means m=2 & y=mx + b, becomes y=2x + b.
Moreover they are telling us that this function passes by (-2,1), where -2 represents x & 1, represents y. To calculate b , replace x & y by their values:
y=2x+b ==> 1 = 2(- 2) + b==> 1 = -4 + b ==> b= 5. Finally the equation is
y=-2x+5
It is not necessary that the function decreasing over a given interval always be negative.
A function f(x) (value) decreases as x increases.
This does not mean that value of f(x) is negative.
It can have positive number as range.
Multiply 137 by 3 to get an answer of 411
