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marissa subtracted a negative number from a positive number. her result was negative. is that reasonable?
No. When you subtract negative numbers, they have the same effect as if you added a positive number. In this scenario as described, the only result would be a positive number.
How do you subtract a negative fraction from a negative fraction?
In the same way that you would answer a fraction subtract another fraction. The result could be either positive or negative, just as is the case with negative whole numbers.
How do you multiply a fraction by a negative number?
Using the same principles as multiplying a negative whole number by a positive whole number, where the result would be a negative, the product of a (positive) fraction and a negative whole number would equal the product of the two, with the minus sign included. For example, 1/2 x -4 = -2. The same rule can be applied the other way around, multiplying a negative fraction by a positive number would produce the same result.
How do you multiply negative four and negative twenty-two?
Well, first you notice that both signs are negative and in math when a negative is multiplied by a negative the result is positive. So, all you have to do is multiply the numbers by each other and then remember that both signs were negative and so your answer is positive. If it were -22 x 4 or 22 x -4 the result would be negative because only one number in each has a negative value.
Why does the square root of -25 have no real solution?
Because the square root of -25 would be that number that, squared, would equal -25. No number, positive or negative, can result in a negative square. Since -25 is a negative number, no number, positive or negative, can be squared to equal -25.
