1)4x-7=2x+9
Subtract 2x
2x-7= 9
Add 7
2x=16
X= 8
2(8)+9=25
(8,25)
X+y=10
-X-2y=-14
-y= -4
Y=4
X+4=10
X=6
(6,4)
Gosh, when I saw that my mind went blank
Answer:
the answer is attached to the picture
Cos (314) = .694 is positive
B is the answer b.converse