4 (needs to be twenty characters)
The answer is 52
x - the number of students in a bus
4 + 9x = 472
9x = 472 - 4
9x = 468
x = 468 / 9
x = 52
(3x²+6x+9)(8x-4)= 24x³-12x²+48x²-24x+72x-36= 24x³+36x²+48x-36
R: E
The least common denominator is 15. The equivalent fractions would be 10/15 and 12/15.
I assume that by square corners you mean 90 degree angles. if this is the case then there are 2 in a pentagon. Hope I helped :)
