If 7x+2y-6z =12 and if x y and z are positive then what is the value of 2+z/7x+2y

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?

∆red ≅ ∆ by rule will give brainiest if possible

What is the product? a-3/15a × 5/a-3