Jon buys fencing for his yard. he pays 122 for 5 fences posts and 4 fence panels. matt pays 570 for fence post and 20 fence panels no

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Why is causation so much more difficult to prove than correlation?