If the solution, makes the denominator equal to zero, makes the expression of a logarithm or under a square root, a negative one. If there are more than one denominator, check all the solutions. Usually, we determine the extraneous solutions before we solve the equation.
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The "vertical line test" will tell you if it is a function or not. The graph is not a function if it is possible to draw a vertical line through two points.
"You can check out that almanac for 7 days then you must return it." "In the days before technology, farmers would consult an almanac to determine what weather might be coming."
They have volunteers and many weather stations places all over a region. They get many reports all throughout the day and update the information accordingly. They use recorded data to determine the highs and lows for a specific region for a specific date, which is why they report record highs and lows for an area as well. Some of these records date back 125 years or more. Today, they have computer models that tell them.
Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.
it brings in fair weather