John is twice as old as mary. the sum of their ages is 52. how old is mary?

if j = john's age and m = mary's age, which system of equations could be used to solve the problem?

2j = m and j + m = 52
j = 2m and j + m = 52
j = 2m and jm = 52

An empty bucket is placed under a faucet dripping at a constant rate of 4 milliliters per minute. with the given information, which of these statements is a reasonable conclusion? a there will be 24 milliliters of water in the bucket after 16 hour. b there will be 60 milliliters of water in the bucket after 14 hour. c there will be 160 milliliters of water in the bucket after 20 minutes. d there will be 100 milliliters of water in the bucket after 40 minutes.

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

The tile along the edge of a triangular community pool needs to be replaced? ?