Step-by-step explanation: In this equation, it's important to understand that the number 5 is the coefficient on the variable M. This just means that -5 "times" M equals -40. So, whenever you see a number next to a variable, it means multiplication.
If we were to solve, we would just divide both sides of the equation by 5. On the left the 5's cancel and on the right, -40 divided by 5 is -8.
Convert 10% into a decimal
(0.1)^{2} - (5%)^{2}
Remove parentheses around 0.1
0.1^{2}-(5%)^{2}
Raise 0.1 to the power 2 to get 0.1
0.01-(5%)^{2}
Convert 5% to a decimal
0.01-(0.05)^{2}
Remove parentheses around 0.05
0.01-0.05^{2}
Raise 0.05 to the power of 2 to get 0.0025
0.01-1*0.0025
Multiply -1 by 0.0025 to get -0.0025
0.01-0.0025
Subtract 0.0025 from 0.01 to get 0.0075
You Answer is: 0.0075
Either way you still have the exact same amount of material length no matter if melted and remolded or simply cut
You can look it up on Socratic
