Identify the property of real numbers that is demonstrated by the equation 12+0=12

In the diagram below, tan θ = sqrt 3. what is the value of m?

This week, conrad will work 1 3/4 times longer than last week. giovanni will work 1 1/3 times longer than last week. sally will work 2/3 the number of hours she worked last week. match each employee's name to the number of hours he or she will work this week

Which of the following is true for the relation f(x)=2x^2+1