Trong số 50 học sinh của lớp có 25 học sinh có năng khiếu Toán. 17 có năng khiếu Văn. 12 học sinh không giỏi cả Văn và Toán. Tìm số học sinh của lớp giỏi cả Văn và Toán

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap