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!
A. C = 17h + 15 b. 83 = 17h + 15 -15 - 15 subtract 15 from both sides 68 = 17h ------------ 17 divide both sides by 17 4=h They cleaned the house for 4 hours c. C = 20x to do this last part, you would put both equations into the calculator under y=, then look at the table to determine when the price is the same. According to the calculator, the price is the same at 5 hours
