Answer:
x = 5
Step-by-step explanation:
the supplementary angle of (19x-18) = 180 - (19x-18) = 198-19x
all interior angles of a triangle = 180 degrees
180 = (7x+1) + (10x-9) + (198-19x)
180 = 7x+10X-19x+1-9+198
180 = -2x+190
-2x = -10
x = 5
Answer:
The answer is in the image below
2 lazy to plug in calc so you do diZ.

Ez $_$
She can make 12 different combinations.
If she used three different colors for the keychain, there's still 4 other colors left.
4 x 3 = 12
Answer:
1,800 parts per hour
Step-by-step explanation:
330 parts = 11 min
330/11=30
30 parts = 1 min
60 min = 1 hour
30x60min=1,800
1,800 parts per hour