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swat32
3 years ago
7

If h(x) = 1 2 x4 - 3x3, find h(4) A)-200   B)-64  C)-28D)-16

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
5 0

Answer:

-64

Step-by-step explanation:

h(x) =\frac{1}{2}x^4 - 3x^3

Now we need to find out h(4)

to find h(4), we plug in 4 for x

Replace all x by 4 in h(x) and evaluate h(4)

h(x) =\frac{1}{2}x^4 - 3x^3

h(4) =\frac{1}{2}(4)^4 - 3(4)^3

h(4) =128- 192=-64

So the value of f(4)= -64

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\bf \begin{array}{lccclll}
&distance&rate&time\\
&-----&-----&-----\\
\textit{with the wind}&2240&r+40&t\\
\textit{against the wind}&1920&r-40&t
\end{array}
\\\\\\
\begin{cases}
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1920=(r-40)t\\
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1920=(r-40)\left( \boxed{\frac{2240}{r+40}} \right)
\end{cases}
\\\\\\
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\\\\\\
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\\\\\\
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