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VladimirAG [237]
3 years ago
14

$119.50 skateboard 20% off

Mathematics
2 answers:
VMariaS [17]3 years ago
6 0
119.5 * 0.2= 23.9

119.5-23.9= 95.6

New price, $95.60
Triss [41]3 years ago
5 0
To find 20% of 119.50 you multiply 119.50 by 20% in decimal form
Then you subtract the discount (d) from the total to get your new price (n)

119.5*.2=d
23.9=d

119.5-d=n
119.5-23.9=95.6

So the new price is <u><em>$95.60</em></u>
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Answer:

C. \frac{5}{4}

D. \frac{6}{7}

Step-by-step explanation:

C. 2 -  \frac{12}{16}

= 2 -  \frac{3}{4}

=  \frac{8 - 3}{4}

=  \frac{5}{4}

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3 years ago
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Answer:

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Step-by-step explanation:

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Allushta [10]

Answer:

See explanation

Step-by-step explanation:

We are given f(x)=ln(1+x)-x+(1/2)x^2.

We are first ask to differentiate this.

We will need chain rule for first term and power rule for all three terms.

f'(x)=(1+x)'/(1+x)-(1)+(1/2)×2x

f'(x)=(0+1)/(1+x)-(1)+x

f'(x)=1/(1+x)-(1)+x

We are then ask to prove if x is positive then f is positive.

I'm thinking they want us to use the derivative part in our answer.

Let's look at the critical numbers.

f' is undefined at x=-1 and it also makes f undefined.

Let's see if we can find when expression is 0.

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A fraction can only be zero when it's numerator is.

Simplify numerator equal 0:

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This happens at x=0.

This means the expression,f, is increasing or decreasing after x=0. Let's found out what's happening there. f'(1)=1/(1+1)-(1)+1=1/2 which means after x=0, f is increasing since f'>0 after x=0.

So we should see increasing values of f when we up the value for x after 0.

Plugging in 0 gives: f(0)=ln(1+0)-0+(1/2)0^2=0.

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beks73 [17]

Answer:

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Step-by-step explanation:

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