The circumference of mars is about 10664. find the diameter of mars nearest to km

Matilda and kathryn went on different road trips over spring break.the equation below represents the number of miles matilda drove in x hours.y = 60xthe table below shows the number of miles kathryn drove in x hours.time(in hours)distance(in miles)114228342456who drove at a greater speed? a. matilda drove at a greater speed.b. matilda and kathryn drove at the same speed.c. kathryn drove at a greater speed.d.there is not enough information to determine their speeds

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

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2