Rob simplified an expression using the following steps. Step 1: 2x – 3 + 5x + 7 Step 2: 2x + 5x – 3+ 7 Step 3: 7x + 4 Which property justifies Step 3?​

(note i put the graph in so plz )the graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel. what is the slope of the line

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab