A mineral sample scratches fingernails pennies and glass but does not scratch steel

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

James needs to move this box. he has already checked it and knows it is not too heavy for him to lift. he also has a clear path and a place to safely set down the box. tell james what to do next to safely lift this box by placing the steps in the correct order. place the options on the left in the correct sequence by dragging them to the appropriate answer box to check your answer.

Why has there been such a large increase in theft and other crimes in the u.s