The expression is ' 0 ', as in 'zero'. If it were anything else, then that wouldn't help you go back to where you started and get what you forgot.
Answer:
Step-by-step explanation:
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Answer: I think the answer is B. 3.
Step-by-step explanation:
Its pretty easy remeber than 1kg eqauls 1000 grams (Kilo) means Thousand
so the 4 books would be 79,800 grams
14. 2x-1 = 0, x+7=0
x = 1/2, x = -7
15. x^2 + 3x - 10 = 0
(x + 5)(x - 2) = 0
x = -5, x = 2
16. x^2 - 25 = 0
(x-5)(x+5)
x = 5, x = -5