No entiendo matemáticas alguien me podría ayudar​

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis