Answer:
1. 30x 2. 9x+5y 3. 8x+ 20y 4. 7(5x+ 4y)
Explanation:
1. If you multiply 5*6 you would get 30. So 1. 30x. 2. If you add the like terms you would get 9x + 5y. 3. you can use the distrubitive property. 4. You have to find the LCM. And find the other factor and add the variable. I am sorry I will work on the other 2. Hope this helps, let me know if correct, and have a great day!!