Timed help asap free 30 points after if correct find the value of the polynomial x^2-3xy+1/2 y^2 if x=3,y-2
1 answer:
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Answer:
Step-by-step explanation:
Let be the quadratic function.
implies that
Similarly,
and
From equation 2,
Put (4) into (1) to get:
Put (4) in (3) to get:
Subtract (6) from (5) to get:
Put b=-3 in (4) to get:
a=--3-5=-2
Put b=-3 in to (6) to get:
-2(-3)+c=-3
6+c=-3
c=-6+-3=-9
Therefore the required equation is
The first thing we must do for this case is to define variables.
We have then:
P: pressure
A: Area of the sole of the shoe
Since the variation is inverse, we have an equation of the form:
We must find the value of k.
For this, we use the following data:
when the shoes have a sole area of 40 in ^ 2 The pressure is 4 lbs / in ^ 2
Substituting values we have:
From here, let's clear k:
Then, the equation is:
Answer:
The equation that relates these variables is:
We have then:
P: pressure
A: Area of the sole of the shoe
Since the variation is inverse, we have an equation of the form:
We must find the value of k.
For this, we use the following data:
when the shoes have a sole area of 40 in ^ 2 The pressure is 4 lbs / in ^ 2
Substituting values we have:
From here, let's clear k:
Then, the equation is:
Answer:
The equation that relates these variables is: