What is the vertex and equation of directrix of the parabola x²-8y+4x=0​

What is the total surface area of this square pyramid?

Shelly bought a house five years ago for $150,000 and obtained an 80% loan. now the home is worth $140,000 and her loan balance has been reduced by $12,000. what is shelly's current equity?

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.