Answer:
The volume is the amount of space an object takes up.
The mass is the measure of how much matter in a object.
The density is the mass <em>divided </em><em>by</em> volume.
Answer:
5x^2-13x+6
Step-by-step explanation:
(8x^2-6x+2)-(3x^2+7x-4)
8x^2-3x^2-6x-7x+2-(-4)
5x^2-13x+2+4
5x^2-13x+6
Answer:

Step-by-step explanation:

Answer:
Brother is 70.5 and sister is 64.5
Step-by-step explanation:
you will need to set up a simple equation and give out variables.
Girls age = 6-x
Brother's age= x
the you will take those 2 and add them and place them equal to 135:
6-x+x=135
6-2x+6=135+6
The 6 cancels out
2x=141
2x/2=141/2
x=70.5
The brother's age would be 70.5 then and the girl's would be 64.5