3x+y=9 ....(1)
3x-5y=15. ......(2)
-[3x-5y=15]
=> 3x+ y = 9
-3x+5y=-15
..........................
0 +6y=-6
so,y=-1
3x+(-1)=9
3x=10
x=10/3
Answer:
q = 1.
Step-by-step explanation:
y = (1 - 2q)x - 1
The slope of this line is 1 - 2q.
(2 - q)y = x + 5
y = x / (2 - q) + 5/(2 - q)
The slope of this line is 1/ (2 - q).
When lines are perpendicular the slopes m1 and m2 have the relation
m1 .m2 = -1, so
(1 - 2q) * 1/ (2 - q) = -1
1 - 2q = -2 + q
-3q = -3
q = 1.
You said it. Mary is 16 years old.
Answer:
a b
Step-by-step explanation: