If a want a track of to have a circumference of 200 feet what does the radius of the track need to be?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Which answer choice is it? is it the first ,second,third or fourth giving 40 points for whoever answers correctly you