Martin drew a pair of perpendicular lines and a pair of parallel lines.

which of these statements best compares the pairs of perpendicular and parallel lines?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol