More practice on addition and subtraction
1: The yearbook is $20 until this Friday. Starting next week, it will be $30. How much cheaper is it to buy the yearbook this week?
2: I caught a fish that was 15 pounds. My brother caught a fish that was 8 pounds. What is the combined weight of our fish?
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a word used to describe an action, state, or occurrence, and forming the main part of the predicate of a sentence, such as hear, become, happen.
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Answer:
You may ask yourself --- how it may happen that the system of 3 equations in 3 unknowns has no a unique solution ?
The answer is: BECAUSE this system of equation is DEGENERATED : its determinant is equal to zero.
It is really rare (but still possible) case in word problems, when the system of three equations in three unknown
does not provide a unique solution ( ! )
Step-by-step explanation:
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