Nina and Jo both ran a 12 km race. Nina took 1 hour 15 minutes to run the whole race.
Jo started the race 6 minutes later than Nina but caught up when they had both travelled 9 km.
If Nina and Jo both ran at constant speeds, what is Jo's speed to 2 dp?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /