How do I work out if two lines are parallel?
The gradients of the two lines must be the same. The gradient is m in the equation: y=mx+c For example: L1: y = 3x – 2L2: 3y – 9x + 5 = 0 First rearrange L2 so it is in the same form as L1 to get:3y=9x-5Then divide L2 by 3 so the y coordinates are the same in L1 and L2 to get:y=3x-5/3Hence, the gradients are the same (3)
AB
Related Maths GCSE answers
All answers ▸A ladder 5.5m long is leaning against a wall. the foot of the ladder is 1.7m away from the wall. how far up the wall does the ladder reach?
Work out 3 3/4 x 2 6/7 giving your answer as a mixed number in its simplest form.
3 teas and 2 coffees have a total cost of £7.80. 5 teas and 4 coffees have a total cost of £14.20. Work out the cost of one tea and the cost of one coffee.
The equation of the line L1 is: y = 5x-4. The equation for line L2 is 2y-10x+16 = 0. Show that these two lines are parallel.