What is bigger then 5/6 but smaller then 3/8

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

X+ y = 5 ; x - y =3 solve using linear combination

What is 140% of 25? because i need