The cost of admission to a history museum is $3.25 per person over the age of three , kids three and under get in for free. if the total cost of admission for the warrick family, including their two six month old twins is $19.50 , find how many family members are over three years old

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)