4 years ago

What does subtracting a negative do ?

2 answers:

7 0

Do? I'd answer by saying that subtracting a negative quantity is equivalent to adding the magnitude of that quantity. For example, 2 - (-3) = 2 + 3 = 5.

A negative sign in front of another actually calls up addition.

salantis [7]4 years ago

4 0

If you subtract negative from negative the answer will be positive if u subtract a nevagative from a positive it will become a negative.

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For f(x)=0.01(2)power of x, find the average rate of change from x=3 to x=8

sineoko [7]

$\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\
f(x)= 0.01(2)^x \qquad 
\begin{cases}
x_1=3\\
x_2=8
\end{cases}\implies \cfrac{f(8)-f(3)}{8-3}
\\\\\\
\cfrac{0.01(2)^8-0.01(2)^3}{8-3}$