3 years ago

A student received a coupon for 20% off the total purchase price at a clothing store. Let z be the

Mathematics

2 answers:

Pachacha [2.7K]3 years ago

4 0

Answer:

i don't know

Step-by-step explanation:

mag-aral ka mabuti para maging matalino

anygoal [31]3 years ago

4 0

Z - 0.2z = 0.8z
Hope that helps

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If f(x)=x^3−x, what is the average rate of change of f(x) over the interval [1, 5]? a)29.5 b)30 c)43 d)120

avanturin [10]

$\bf slope = m = \cfrac{rise}{run} \implies 
\cfrac{ f(x_2) - f(x_1)}{ x_2 - x_1}\impliedby 
\begin{array}{llll}
average~rate\\
of~change
\end{array}\\\\
-------------------------------\\\\
f(x)= x^3-x \qquad 
\begin{cases}
x_1=1\\
x_2=5
\end{cases}\implies \cfrac{f(5)-f(1)}{5-1}
\\\\\\
\cfrac{[5^3-5]~-~[1^3-1]}{4}\implies \cfrac{125-5~~-~~0}{4}\implies \cfrac{120}{4}\implies 30$