Solve the system using substitute. SHOW ALL YOUR WORK

{4y + 5y = 7
{Y = 3x + 9

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?