Obtenga la diferencia común, el décimo termino y la suma de los primeros 10 términos de cada una de las siguientes series aritméticas: 1) 1,-4,-9...
2) 9/2, 39/8, 21/4,...
3) 125, 95, 65...
4) 1.35, 1.20, 1.05...

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.