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vitfil [10]
3 years ago
10

Gina paints beach scenes on notecards. She sells packages of 8 notecards for $8 for one package, $16 for 2 packages, and $24 for

3 packages. Which equation is the rule for the pattern if n is the number of packages and d is the selling price in dollars?
Mathematics
1 answer:
Hitman42 [59]3 years ago
8 0
In this question, each package has 8 notecards. 
one notecard costs $8
2 notecards cost $16
3 notecards cost $24
if n - number of packages
d - selling price in dollars
We can see that with each additional notecard bought the cost increases by $8
therefore there's a proportional relationship between n and d
As n increases, d increases by the same amount.
if we put it in an equation,
d = 8*n
n - 1 package and d is 8 
if n - 2
d = 8*2
d = 16
Therefore we can use the following equation;
d=8n
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allochka39001 [22]

Answer:

B

Step-by-step explanation:

<u>Definition:</u> Two rectangles are similar when they have corresponding sides proportional are proportional by dilation.

For example, rectangles with sides 3 cm, 4cm and 6 cm, 8 cm are similar, but rectangles with sides 3 cm, 4 cm and 6 cm, 10 cm are nor similar.

Since all angles in rectangle are always right angles, then options A and C are false (in terms of your question).

Option D is false too, because translation doesn't change the length, and in this case two rectangles are congruent.

Option B is true according to definition.

3 0
3 years ago
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1, In a class of 80 students in Debreberhan University, 45 are good in mathematics, 15 are good in both mathematics and in Engli
Aleks [24]

Treating the data as a Venn set, it is found that:

  • 26 students are good in mathematics only.
  • 28 students are not good in any of the three courses.

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

I am going to say that:

  • A is the number of students good in Math.
  • B is the number of students good in English.
  • C is the number of students good in Psychology.

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

9 are good in all of the three courses.

This means that: A \cap B \cap C = 9

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

13 are good in both mathematics and psychology

This means that:

(A \cap C) + (A \cap B \cap C) = 13

(A \cap C) + 9 = 13

(A \cap C) = 4

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15 are good in both mathematics and in English

This means that:

(A \cap B) + (A \cap B \cap C) = 15

(A \cap B) + 9 = 15

(A \cap B) = 6

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

16 are good in both English and psychology

This means that:

(B \cap C) + (A \cap B \cap C) = 16

(B \cap C) + 9 = 16

(B \cap C) = 7

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

20 are good in psychology

This means that:

c + (A \cap C) + (B \cap C) +  (A \cap B \cap C) = 20

c + 4 + 7 + 9 = 20

c = 0

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

45 are good in mathematics

This means that:

a + (A \cap B) + (A \cap C) +  (A \cap B \cap C) = 45

a + 6 + 4 + 9 = 45

a = 26

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

Question a:

a = 26, which means that 26 students are good in mathematics only.

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

Question b:

At least one is:

a + (A \cap B) + (A \cap C) + (B \cap C) +  (A \cap B \cap C) = 26 + 6 + 4 + 7 + 9 = 52

Thus, 80 - 52 = 28

28 students are not good in any of the three courses.

A similar problem is given at: brainly.com/question/22003843

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Step-by-step explanation:

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8/10. I think that is what you are asking for but I'm not sure so sorry if I'm wrong.
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