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Mark is thinking of two numbers his two numbers have a positive sum but they have a negative product give an example of what his answer could be?
10, -9 sum is 1 product is -90. any two numbers one positive one negative, positive has to be larger
What two numbers have a sum of 5 and product of -36?
41
Dose a negative number plus a negative number equal a positive number?
No. The sum of two negative numbers will always be a negative number. If, however, you multiply the numbers, their product will be positive.
How can you decide if the sum of two numbers is positive negative or zero without calculating the sum?
The sum of two negative numbers is positive and the sum of two negatives is negative. If you have both positive and negative numbers the sum can be either so look at the absolute value. If the negative number has a greater absolute value, the sum is negative. If the positive number has a greater absolute value the sum is positive. If the absolute values are equal, the sum is zero.
If the product of two numbers is positive then the two numbers must both be positive?
No! If one number is negative and the positive is greater than it's interval (positive version [e.g. the interval of -6 is 6]), then the product will very well be positive. In theory, of course. Sorry, tenth grader speaking... Small error here; product is the result of multiplication. The answer above is correct for a sum, but not a product. The rule for a product is even simpler than for a sum :- If the two numbers have the same signs (both positive or both negative) then the result will be positive. If the numbers have different signs the result will be negative.
