YEEEEEET

3+0.22 = 3.22

Assuming Sarah travelled in a constant speed

she travelled 15 miles in 2 hours, so 15/2= 7.5 so she goes 7.5 miles per hour 

each miles is 1760 yards, 1760*7.5= 13200 yard 

so we know that she travelled 13200 yards in an hour, there are 60 mins in an hour

applying the equation distance/time = speed

we get 13200/60 = 220

so she travels 220 yards every mins

you are correct, thank you very much

yeah so sorry, i managed to write the question wrong

Thank you!

oh.... thanks so much xd

ye sorry about that

to know the solution to every maths problem in the world so i dont have to struggle with my d**n course XD

 Right so this is my attempt at the question:

From the graph we know that from B A = -b+a and O A  = a

we know that OX = 2a-b, assuming A is in the way if we subtract the value it takes to get to A from O then we get AX= a-b 

as 2a-b - a = a-b.

then we can get the value of BX by adding the "distance" of BA and AX which is 2a-2b.

we know that B, A , X lies on the same staight line because AX (a-b) is a factor of BX (2a-2b).

let me know if im wrong 

thank you so much!