Factor the expression 9X^2 - 4Y^6

If chord ab is congruent to chord cd, then what must be true about ef and eg?

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

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9