Answer:
3
Step-by-step explanation:
We know x = -2, so we can substitute -2 in for x
3x^2- 9
3*-2^2-9
Solve the exponent first (PEMDAS)
3*4-9
Multiply next
12-9
Subtract
3
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72:80
9:10
Divide 72 and 80 by 8 to simplify it and get the ratio
Answer:
2 2/3
Step-by-step explanation: