MATH HATES ME HALP
Which expressions are completely factored?
Select each correct answer.
18y3−6y=3y(6y2−2)
32y10−24=8(4y10−3)
16y5+12y3=4y3(4y2+3)
20y7+10y2=5y(4y6+2y)

Umm.. just started this 2day and its not on my notes(p′︵‵。)

Acaterer charges $500 plus $30 per guest to cater a wedding. walt and traci don't want to spend more than $8000 on catering. write and solve an inequality in terms of the number of guests, g, that can be invited. a) 30g ? 8000; g ? 267 b) 500g < 8000; g < 16 c) 500 + 30g < 8000; g < 250 d) 500 + 30g ? 8000; g ? 250

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?