My friend Elentine purchased 9 Naxvips for $2 each and some toys for $8 each.
1 answer:
The equations to model the relationship between Elentine's naxvips (x) and toys (y) is: Total cost = 18 + 8y
<em><u>Solution:</u></em>
Let "x" be the number of naxvips bought
Let "y" be the number of toys bought
From given,
Cost of each naxvip = $ 2
Cost of each toy = $ 8
My friend Elentine purchased 9 Naxvips for $2 each and some toys for $8 each.
Thus according to given we frame a equation as:
Total cost = 9 naxvips x 2 + y x 8
Thus total cost spend is (18 + 8y) dollars
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The average rate of change from x = -1 to x = 2 is 2
<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>
<em><u>The average rate of change from x = -1 to x = 2 is given by formula:</u></em>
<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>
Thus average rate of change from x = -1 to x = 2 is 2