How to calculate algebraic expression?

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers