Answer:
20/40 = 10/20 = 1/2, 1:2
Step-by-step explanation:
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<span>The coefficient for x^7*y is equal to 8Choose7 which is 8!/7! which is 8, or answer b. Pascal's triangle may be used to capture this as well, or use the exponent as above.</span>
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No, because 93/7 is not a rational number
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