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3 years ago

7. Allan went shopping for stationery. He bought x pens at $1.75 each and y books at

Mathematics

1 answer:

timurjin [86]3 years ago

4 0

Answer:

$4.25

Step-by-step explanation:

x pens=$1.75

y pens =$2.50

Now,

in the terms of x and y ,

Alan spend altogether=1.75 +2.50

=$4.25

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3 years ago

Find all zeros of ƒ(x) = 2x^4 – 72x^2. Then determine the multiplicity at each zero. State whether the graph will touch or cross

AleksandrR [38]

Answer: See below

Step-by-step explanation:

To find the factor,

f(x) = 0

$\begin{aligned}&2 x^{4}-72 x^{2}=0 \\&2 x^{2}\left(x^{2}-36\right)=0 \\&x^{2}\left(x^{2}-36\right)=0 \\&x \times x \times(x-6) \times(x+6)=0 \\&\mathrm{x}=0,0,6,-6\end{aligned}$

So,

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For an even multiplicty, the graph touches the x-axis, and for an odd multiplicty, the graph crosses the x-axis

Therefore,

x = 0 multiplicty 2, Touch

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x = 6 multiplicty 1, Cross

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2 years ago