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shtirl [24]
2 years ago
5

an online electronics store bought 24 keyboards and 15 phone chargers for $120 and then sold each keyboard for $35 and each phon

e charger for $15. part a: which expression represents the amount of money the store made? (1 point) (24)(15) (15)(35) − 120 (24)(35) (15)(15) − 120 (24)(15) (15)(35) 120 (24)(35) (15)(15) 120 part b: explain why your answer to part a is correct. (1 point) part c: what is the value of the expression you chose in part a? show each step of your work. (2 points)
Mathematics
1 answer:
sweet-ann [11.9K]2 years ago
3 0

The Amount made by store is expressed as 24(35) + 15(15) - 120. This is correct because profit = selling price - cost proce.

<h3>How to use order of operations?</h3>

The order of operations to be used is PEMDAS which is an acronym for the words parenthesis, exponents, multiplication, division, addition, subtraction.

Now, we are told that an online electronics store bought 24 keyboards and 15 phone chargers for $120.

Now, they  sold each keyboard for $35 and each phone charger for $15. Thus, the expression to show the amount of money the store made is;

Profit = Selling Price - Cost Price

Thus, we have;

Amount made by store = 24(35) + 15(15) - 120

Read more about Order of operations at; brainly.com/question/345677

#SPJ1

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The diameter of a wheel of a lorry is 150cm. If the lorry travels 376.8m, how many times does the wheel rotate?
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<h3>Answer:  79 full rotations</h3>

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Explanation:

150 cm = 150/100 = 1.5 m

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C = 1.5pi

C = 4.71238898038469

I'm using my calculator's stored version of pi to get the most accuracy.

Then we divide the 376.8 over the circumference found

(376.8)/(4.71238898038469) = 79.9594434093682

Despite being very close to 80, we must round down to 79 because we don't have enough to get that full 80th rotation. In other words, we have 79 full rotations and then some change leftover.

Though for the sake of simplicity, I can see how it's useful to say "about 80 rotations" if 79 seems a bit clunky. I'll stick with 79 however. Let me know if your teacher instructs otherwise.

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