Jenny wants a total of 12 barbie dolls by the time she is 9 years old. right now she has 4 barbie dolls. how many more does she need?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25