Multiply (-3a + 4b) by 5a.​

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

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

Which is the directrix of a parabola with equation x2=8y y = 2 x= -2 y=-2 x= 2