Peggy had four times as many quarters as nickels. She had $2.10 in all. How many nickels and how many quarters did she have? If the variable n represents the number of nickels, then which of the following expressions represents the number of quarters?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?

How does reflecting or rotating a figure change the interior angles of the figure?