Pens (2) Ying's teacher has a box of pens and crayons, and there are 2 times as many
crayons as pens. If each student receives 2
there are 6
pens,
left over. If
each student receives 5 crayons, there are 7 crayons
left over. How many
students and pens are there?

What dimensions can créate more than one triangle ?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?