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.

Ratio of circumference to diameter example plz i need to now what it looks like.

To start to solve the system of equations below, which number would you multiply in the equation -2x-5y=-1? the two equations are -2x-5y=-1 and 4x+2y=8

The accompanying normal probability plot was constructed from a sample of 30 readings on tension for mesh screens behind the surface of video display tubes used in computer monitors. does it appear plausible that the tension distribution is normal? the given probability is has a significant downward curve, so it is plausible that the tension distribution is normal. the given probability is has a significant downward curve, so it is not plausible that the tension distribution is normal. the given probability is quite linear, so it is plausible that the tension distribution is normal. the given probability is has a significant upward curve, so it is not plausible that the tension distribution is normal. the given probability is quite linear, so it is not plausible that the tension distribution is normal.