19g - 4h + 4 - 20(g - 1)

Can you plss help me

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

How many verticies does a triangular prims have

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture