A shop sells packs of black pens, packs of red pens and packs of green pens. There are
3
pens in each pack of black pens
5 pens in each pack of red pens
pens in each pack of green pens
On Monday,
number of packs number of packs
of black pens sold of red pens sold
=7:3:4
number of packs
of green pens sold
A total of 212 pens were sold.
Work out the number of green pens sold.

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters