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Oksanka [162]
3 years ago
11

A shopper paid $51.93 including tax for an item marked $48.99. What would she pay for another item marked $75? Find the tax rate

OAC/OA, round to the nearest whole percent, then use it to find the tax on $75.
Mathematics
1 answer:
jonny [76]3 years ago
4 0
Tax should be 6% and 75 would come out to about 79.5 to be precise.
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Find the average rate of change of f(x)=2x-1 from x=-1 to x=2
MrMuchimi

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<u>Solution:</u>

Given function is:

f(x) = 2x - 1

We have to find the average rate of change from x = -1 to x = 2

<em><u>The average rate of change is given as:</u></em>

\text {Average rate of change}=\frac{f(b)-f(a)}{b-a}

<em><u>The average rate of change from x = -1 to x = 2 is given by formula:</u></em>

\text {Average rate of change}=\frac{f(2)-f(-1)}{2-(-1)}\\\\\text {Average rate of change}=\frac{f(2)-f(-1)}{3}

<em><u>Find f(2) and f( - 1)</u></em>

<em><u>Substitute x = 2 in given function</u></em>

f(2) = 2(2) - 1 = 4 - 1 = 3

<em><u>Substitute x = -1 in given function</u></em>

f( - 1) = 2(-1) - 1 = -2 - 1 = -3

<em><u>Substitute the values in above formula,</u></em>

\text {Average rate of change}=\frac{3-(-3)}{3}=\frac{6}{3}=2

Thus average rate of change from x = -1 to x = 2 is 2

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