A glass panel in a window weighs 4,2 kg it's 77cm high and 50cm wide how tick is the glass? It has the density of 2,5g/cm³. Round it to millimeters

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes