A triangle with sides measuring 300, 400 and 700 because 300+400+700=1400 which is higher than the first triangle 300+400+500=1200
He should have written x= y2 + 12y .X must be less than or equal to zero. It should be x <0.
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It is already in simplest form, since 17 is a prime number.
Answer: The difference between a number and five is negative 2
Step-by-step explanation: