7. The design shown below is constructed by joining three semicircles with diameters of 6, 8, and 10 centimeters. Which of the following is closest to the total length of the curved pieces of this
design?
(1) 15.1 cm
(2) 24.0 cm
8 cm
10 cm
6 cm
(3) 37.7 cm
(4) 75.4 cm

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.