The function f(x)=-x²+8x-7 is translated five units down. Write the new equation in vertex form and state the vertex.

What is the definition of exponential decay?

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?