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insens350 [35]
3 years ago
10

Rolex buys a computer disks at a price of 4 for $5 and sells them at a price of 3 for $5 . How many computer disks must he sell

to make a profit of $100
Mathematics
1 answer:
mezya [45]3 years ago
4 0
He buys them at a unit price of 0.80 a CD. (to find this just divide the number of materials by the cost) And he sells them for 0.60 a piece. Then, you have to divide 100 by 0.60, which would be estimated to around 167. ( the exact number is 166.6666667) So, about 167 CD's would have to be sold by him to make at least a profit of $100. 
Hope this helped.
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Can someone help me there's supposed to be two answers but all I got was A
OlgaM077 [116]
D is also correct. if you need an explanation let me know
3 0
3 years ago
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5. You are scheduling your classes for next year. There are 4 required classes: a physical education
puteri [66]
<h3>Answer:   450</h3>

==============================================

Explanation:

For now, let's consider we can only select 2 classes instead of 4. Let's say we only had to worry about PE and history.

Let A,B,C,D,E represent the five PE classes.

Let F,G,H,I,J,K represent the six history classes.

If you arrange the letters in a table, you should get 5*6 = 30 different inner boxes of the table. Refer to the diagram below.

Each two letter code in the table represents the 2 class combo. For example, BG means you picked PE class B and history class G.

This idea can be extend to selecting 3 classes. Imagine that each of the codes in the table are laid along the side of a new table. So we'd have a table of 30 rows. Then lay out 5 columns (say with letters L,M,N,O,P) to represent the 5 English classes. You would get a table of 30*5 = 150 different combos here. Of course you shouldn't actually make such a table since it's so large, but I'm simply just saying for you to imagine one. All of the tables mentioned are completely optional. A tree diagram is another way to organize things, though tree diagrams tend to get cumbersome.

Anyway, we would have 5*6*5 = 30*5 = 150 different ways to pick the PE, history and English classes. We can extend this out to include the math classes as well.

-------------------------

In short, all we do is multiply the given values together:

5*6*5*3 = 30*15 = 450

This idea is known as the counting principle.

5 0
2 years ago
3. What is the exact area of triangle ABC? Use special right triangles to help find the base of the triangle. Show your work.
Oduvanchick [21]

The exact area of triangle ABC is 93.51 cm².

The given parameters;

  • <em>Height of the triangle, h = 18 cm</em>

The base of the triangle is calculated by using trigonometry ratio as follows;

tan (30) = \frac{b}{18} \\\\

where;

  • <em>b </em><em>is the </em><em>base </em><em>of the </em><em>triangle ABC</em>

<em></em>

<em></em>b = 18 \times tan(30)\\\\b = 10.39 \ cm<em></em>

The area of the triangle ABC  with the calculated base and given height is calculated as follows;

A = \frac{1}{2} \times base \times height\\\\A = \frac{1}{2} \times 10.39 \times 18\\\\A = 93.51 \ cm^2

Thus, the exact area of triangle ABC is 93.51 cm².

Learn more about area of a triangle here: brainly.com/question/23945265

3 0
2 years ago
Kennedy wants to use an internet site to sell his gmae system. the website will charge him a fee that will be deducted from the
EleoNora [17]
We want to find 9.5% of $50.

First put 9.5% in decimal form. 9.5% = 0.095.

Then multiply 0.095 by 50. 50 * 0.095 = $4.75 fee

The money Kennedy will recieve is going to be 50 dollars minus the $4.75 fee.

50 - 4.75 = $45.25 with the fee subtracted

4 0
3 years ago
Helpppppppp due todayyyy
dimaraw [331]
B I think please give me brainliest
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