Answer:
-10a^2 + 2b + 2ab (u may need to flip the signs on this answer because I don't know what value is being subtracted from the other
Step-by-step explanation:
-6a^2 + 2b - 4ab - 4a^2 + 6ab
= -10a^2 + 2b + 2ab
You should buy the 0.8 kilogram block of wax because 1000 grams is equal to a kilogram and 1000 milligrams is equal to a gram. If you add all of these up, you will get less than 0.8 kilograms so it will be useless to get way more when you don’t need it.
You can use Newton's law, Resultant force=Mass×Acceleration.To find the acceleration take force over mass of the person which is 761N÷75.0kg.Hope this helps.