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enot [183]
2 years ago
15

-5+(-3).I know the answer is -8 but how because a negative plus a negative is a positive.

Mathematics
1 answer:
ira [324]2 years ago
8 0

Answer:

“two negatives = positive” rule works for multiplication and division.

Step-by-step explanation:

-5 + (-3) example

imagine a number line with 0 in the center. From (0) You move left 5 places to (-5) on the number line. Now you move another 3 more to the left (-3) and land on (-8).

You are combining the negatives. I hope this helps.

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Given the function f(x) = 4x - 2, explain and show how to find the average rate of change between x = 2 and x = 4.
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Answer:

The average rate of change between x = 2 and x = 4 is of 4.

Step-by-step explanation:

Average rate of change:

The average rate of change of a function f(x) in an interval [a,b] is given by:

A = \frac{f(b)-f(a)}{b-a}

In this question:

f(x) = 4x - 2, b = 4, a = 2

Thus:

f(b) = f(4) = 4(4) - 2 = 16 - 2 = 14

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A = \frac{f(b)-f(a)}{b-a}

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The average rate of change between x = 2 and x = 4 is of 4.

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