Q: Three planes are flying parallel to one another. The distance between plane 1 and plane 2 is half the distance between plane 2 and plane 3. Plane 2 is flying along the path given by the equation 3x-4y=17. When plane 1 is at the point (4,5), how far (in metres) is plane 2 from plane 3? *Ik the answer is 10 metres but how do you get the answer?*

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

a

step-by-step explanation: