show that ratioanl numbers are closed under addition and subtraction by taking the numbers 1/7 and -2/3
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0
Answer:
162
Step-by-step explanation:
is the answer the quatation of every 1.98 billion lives is discovered my the mental health of them
Answered by
1
Step-by-step explanation:
1/7 + -2/3
= 1/7× 3/3 + -2/3 ×7/7
= 3/21 + (-14/21)
= (-11/21) (rational)
1/7 - -2/3
= 1/7× 3/3 +2/3 ×7/7
= 3/21 + 14/21
= 17/21 (rational)
Hence verified
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