A paving company makes concrete by adding water to a mix that is 1 part cement, 3 parts sand and 3 parts aggregate (stone). What fraction of this mix is aggregate? Express your answer as a common fraction.

3/7 is your answer

Step-by-step explanation:

all I do is add all the numbers and take aggregate over the total

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

1. a^4+8a^3+24a^2+32a+16

2.y^8+8y^7+28y^6+56y^5+70y^4+56y^3+28y^2+8y+1

3.x^6-3x^4y^2+3x^2y^4-y^6