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german
1 year ago
14

You had $21 to spend on eight notebooks. After buying them you had $5. How much did each notebook cost?

Mathematics
2 answers:
sammy [17]1 year ago
8 0

Answer:

each notebook costs $2

Step-by-step explanation:

21-5=16/8=$2

Mkey [24]1 year ago
5 0
Each notebook cost $2
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In case you're not already aware, the expression \frac{f(x+h)-f(x)}h is called the "difference quotient" and represents the average rate of change of a function f over an interval [x,x+h].

For the function f(x)=x^2+3x+4, by substituting x+h we get

f(x+h)=(x+h)^2+3(x+h)+4=(x^2+2xh+h^2)+(3x+3h)+4=x^2+3x+4+(2x+3)h+h^2

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