What you can do is simply switch the fractions like so, 3/4 and 12/16 then simplify 12/16 and you get 3/4 so your answer is yes, it is proportional.
Answer:
Step-by-step explanation:
1). (B). Replace one equation with the sum/difference of both equation.
System B is
- 4x - 6y = 9 ........ <em>(1B)</em>
-4x + 3x = - x
- 6y + y = - 5y
9 - 4 = 5
- x - 5y = 5 ........ <em>(2B)</em>
2). Yes, both system are equivalent.
Answer:the map notation is (x,y) to (y,-x) at a 90 degree angle
180 degrees map notation is (x,y) to (-x,-y)
360 degrees map notation is (x,y) to (-y,x)
Step-by-step explanation: the answer is they are congruent