colton has $0.40 worth of pennies and nickels. he has a total of 16 pennies and nickels altogether. determine the number of pennies and the number of nickels that colton has.

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Marshall went to the state fair and bought 3 tickets. each ticket to the fair cost x dollars. after he bought the tickets, he had $3.25 left in change. write an expression that represents the amount of money, in dollars, that marshall had before he bought the tickets. n