Answer:-8x^2-6x+36xy^2+27y^2
Step-by-step explanation:
using the FOIL method
A quadratic equation has the general form
of: <span>
y=ax² + bx + c
It can be converted to the vertex form in order
to determine the vertex of the parabola. It has the standard form of:
y = a(x+h)² - k
This can be done by completing a square. The steps are as follows:
</span><span>y = 3x2 + 9x – 18
</span>y = 3(x2 <span>+ 3x) – 18
</span>y + 27/4= 3(x2 <span>+ 3x+ 9/4) – 18
</span>y = 3(x2 + 3/2)^2 – 99<span>/4
</span>
Therefore, the first step is to group terms with the variable x and factoring out the coefficient of x^2.
The bird was 13200 yards away from its original starting point.
Answer:
The total number of CDs sold is 30, and the number of videos is 10.
Step-by-step explanation:
Consider A is the number of Videos sold.
Consider B is the number of CDs sold.
So,
A+ B= 40, B=40 -A
and
$6*A+ $4*B=$180
Replacing, B=40 -A in the second equation
$6*A+ $4*(40 -A)=$180
Distributive property
$6A+ $160 -$4A=$180
$6A -$4A=$180 - $160
$2A=$20
A=$20/$2=10
and B=40 -A, so B=40-10=30
That means, the number of Videos sold is 10
And the number of CDs sold is 30
