Answer:

Step-by-step explanation:
y = 18 + 3x²
- 18 - 18
__________

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SA=6A2 so 6 times 49 squared is 294mmsquared
Answer:
6x-5y=4
6x+3y=30
Step-by-step explanation:
Move variable to the left
5y=6x-4
Reorder the terms
5y-6x=-4
Change the signs
-6x+5y=-4
Move variable to the left
3y=-6x+20
Reorder the terms
3y+6x=20