1. Simplify= xy^3
2. Factorise= (2x+1)(2x-1)
3.
4.
5. Estimate= 415.96
6. Highest Common Factor
70= -70,-35,-14,-10,-7,-5,-2,-1,1,2,5,7,10,14,35,70
98= -98,-49,-14,-7,-2,-1,1,2,7,14,49,98
7. Expand: 4-4x+x^2 Simplify: x^2-4x+4
8.
9. This is actually the easiest you take both the mass and volume and divide them :) which would be 500g<span>÷25cm^3=20g/cm3 </span>
10.
The ones I didn't answer I am not sure about and don't wanna give you any wrong answers :) Hope I helped though!
0.87 mol of Cl2 will occupy 19 L at STP (standard temperature and pressure). A common phrase is that "1 mole of any gas at STP will occupy 22.4 L<span>". We have Avogadro to thank for this relationship, but it only works at 1 atm and 0 C .
Hope i did not sound to smart</span>
Answer:
Step-by-step explanation:
The second one is the right answer
Hmmm I really don’t know I’m truly sorry
8x+4 would be the answer if you combine like terms