Answer:

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

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You add 2x and 7x to get 9x
so the answer is 9x+5y
$86.62 would be the total after 15% tax.
Answer:
102°
Step-by-step explanation:
that's the answer because 40+ 38 = 78. then 180- 78 = 102. Remember that in tringles, all three angles should add up to 180°