What's 21a + 28b factorise fully

Can you guys plz answer this question in order and quickly plz i will give 30 points

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!