Speed=distance/time
s=19km/19min=1km/min
Answer:
208
Step-by-step explanation:
T² -1 =(t)² - (1)² = (t + 1) (t - 1)
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Answer: (t + 1) (t - 1)
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1 on top and 4 on the bottom.
A negative number once is negative. Multiplied by another negative number, it's positive. Multiply that positive number by a negative number, and you have a negative number again. Repeating that pattern, with odd numbers being negative, it is true
