Agold coin weigh 20 grams. if the coin contains gold, copper and tin and in the ratio 4: 3: 1 how much gold is there in the coin ? explain

How can you tell when x and y are not directly proportional?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex