Stephanie sold half of her comic books and then bought fifteen more. She now has 25. How many comics did she have originally?

How far could you drive on 50 gallons of gas

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)