So to find the x vertex u have to apply the formula x= -b/2a so it will be
x= -(-4)/2(1)
x= 4/2
x= 2
and to find the y vertex u just substitute the x value into the original equation so it will be
y= (2)^2-4(2)+1
y= 4-8+1
y= -3
so the coordinates of the vertex are (2,-3)
Answer:
80/4
Step-by-step explanation:
You do
which is 80/4
Here we know that the initial velocity of the car is given by:

And the final velocity of the car is given by:

It took 3 seconds to attain the final velocity, so we have 
Therefore, the acceleration can be obtained by:


Plugging the values of the initial, final velocity and the time, we get:

So the acceleration of the car is given by:

Now we need to find the direction of the average acceleration of the car:

Here, x and y are the coefficients of the 'x' and 'y' components of the vector:

Therefore, the direction of the average acceleration of the car is
.
Conversion factors are ratios of equal qualities.
Answer:
87/8
Step-by-step explanation:
2/3x-7=1/4
2x/3-7=1/4
2x/3=1/4+7
2x/3=29/4
2x= 29/4×3
2x=29×3/4
2x=87/4
x=87/4/2
x=87/4×2
x=87/8