Answer:
3. 
2. 
1. 
Step-by-step explanation:
3. 2x - 5y = −7
- 2x - 2x
__________

2. 5x + 7y = 14
- 5x - 5x
__________

1. 6x + 3y = 12
- 6x - 6x
__________

I am joyous to assist you anytime.
Answer:
-1,-1
Step-by-step explanation:
it is the midpint (-1,-1)
Answer:
The materials price variance is usually the responsibility of the purchasing manager. The materials quantity and labor efficiency variances are usually the responsibility of production managers and supervisors.
4 and 5 because it talks about how
Well I'm assuming you mean percent by o/o
Percentages are out of a hundred so you would write it 228/100