Please help?

Prove that the median to the hypotenuse of a right triangle is half the hypotenuse.
Plan: Since midpoints will be involved, use multiples of __ to name the coordinates for M and N.

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

What is the product? a-3/15a × 5/a-3

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4