How can prime factorization assist with lcm and gcf?

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

Triangle xyz has vertices x(1,3), y(0,0)

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jame pay at the end?