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bonufazy [111]
3 years ago
9

87-(36.5-11.5)*(-3)+9 simplify using order of operations

Mathematics
2 answers:
Shtirlitz [24]3 years ago
8 0

Hello there!

87-(36.5-11.5)*(-3)+9

<u><em>Explanation:</em></u>

<u><em>↓↓↓↓↓↓↓↓↓↓↓↓↓↓</em></u>

<u><em>First you had to used order of operations stands for.</em></u>

<u><em>↓↓↓↓↓↓↓↓</em></u>

<em><u>P-Parenthesis</u></em>

<em><u>E-Exponents</u></em>

<em><u>M-Multiply</u></em>

<em><u>D-Divide</u></em>

<em><u>A-Add </u></em>

<em><u>S-Subtract</u></em>

You had to used apply rule.

87+(36.5-11.5)*3+9

(36.5-11.5)*3=75

87+75+9

Then you add by the numbers.

87+75+9=171

=171

Answer⇒⇒⇒171

Hope this helps!

Thank you for posting your question at here on Brainly.

Have a great day!

-Charlie

OLga [1]3 years ago
5 0
Remember PEMDAS 
Do parentheses, results in 25. So whats left is 87-25*(-3)+9
Then you multiply -25 by -3, answer is 75.        87+75+9
Add all of them up.                                                171
The answer is 171!
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Algebra Word Problem, 9th Grade, Station 2, please help!
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ANSWER


ANSWER TO QUESTION 1.

If you give x surfing lessons, then you will earn $ 25x


If you are charged $200 for using the place, then your profit will reduce by $200.


The profit function is given by


P(x)=25x-200 dollars.


The y-intercept is  -200. It is negative because it is a cost which is a liability. So it does not add to your profit.


ANSWER TO QUESTION 2.

The slope is 25. It is positive because as the number of hours increases, the profit earned also increases. In other words there is a direct relation between the number of hours worked and the profit earned.



ANSWER TO QUESTION 3.

The slope intercept form is when an equation is written in the form;

y=mx+c,


where m is the slope and c is the y-intercept. The profit function in slope intercept form is

P(x)=25x-200


ANSWER TO QUESTION 4.

If you break even, then the difference between the revenue and cost is zero. So we equate the profit function to zero.


25x-200=0



25x=200


x=8


Therefore you need to give 8 different lessons to break even.


ANSWER TO QUESTION 5.

If you give 20 lessons, the x=20. We need to substitute


x=20 in to the profit function to calculate the profit made after 20 lessons.

P(20)=25(20)-200


P(20)=500-200


P(20)=300.


ANSWER TO QUESTION 6.

If the new price is $75, then the new profit function becomes


P(x)=75x-200


ANSWER TO QUESTION 7.

To find the number of lessons that lets you break even, we equate the new profit function to zero.

75x-200=0

We solve for x by adding 200 to both sides of the equation.



\Rightarrow 75x=200

We now divide through by 75

\Rightarrow x=\frac{200}{75}


\Rightarrow x=2\frac{2}{3}


Therefore you would have to 2\frac{2}{3} lessons to break even. That is approximately 3 lessons.


ANSWER TO QUESTION 8.

If you give 20 lessons and we want to find the profit you made with this new profit function, then we have to plug in x=20 in to P(x)=75x-200.


That is,


P(20)=75(20)-200


P(20)=1500-200


P(20)=1300 dollars

















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