please people try to be honest and mark brainliest whenever got answer i am tried answering even i don't get a thank from anyone​

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?