beth says the distance to school is 2.8 kilometers the actual distance is 3.5 kilometers what is the distance error

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Two lines parallel to the same plane are parallel to eachother

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.