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lidiya [134]
3 years ago
8

3. Danielle sorted her marbles into 8 groups. She put 3 red marbles, 3 blue marbles, and 2

Mathematics
1 answer:
Charra [1.4K]3 years ago
5 0

Answer:

D

Step-by-step explanation:

Each group has

3 red

3 blue

2 yellow

That's a total of 3 + 3 + 2 = 8 marbles per group

Also, there are 8 same type of groups, so total number of marbles in 8 groups would be:

8 * 8 =  64

Total marbles = 64

Answer choice D is right.

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A picture on a page was reduced by 60% of its original size, and this copy was then reduced by 20%. What percent of the size of
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Answer:

the final copy should be 12% of the original picture.

Step-by-step explanation:

you multiply 20% by 60%

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Penny has 139 postcards in her collection. Abe has 48 postcards in his collection. Then Abe gives his collection away. He divide
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Answer:

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5 0
2 years ago
Need help. i dont understand this!!!
Ilia_Sergeevich [38]

By the quadratic formula, the <em>solution</em> set of the <em>quadratic</em> equation is formed by two <em>real</em> roots: x₁ = 0 and x₂ = - 12.

<h3>How to find the solution of quadratic equation</h3>

Herein we have a <em>quadratic</em> equation of the form a · m² + b · m + c = 0, whose solution set can be determined by the <em>quadratic</em> formula:

x = - [b / (2 · a)] ± [1 / (2 · a)] · √(b² - 4 · a · c)      (1)

If we know that a = - 1, b = 12 and c = 0, then the solution set of the quadratic equation is:

x = - [12 / [2 · (- 1)]] ± [1 / [2 · (- 1)]] · √[12² - 4 · (- 1) · 0]

x = - 6 ± (1 / 2) · 12

x = - 6 ± 6

Then, by the quadratic formula, the <em>solution</em> set of the <em>quadratic</em> equation is formed by two <em>real</em> roots: x₁ = 0 and x₂ = - 12.

To learn more on quadratic equations: brainly.com/question/1863222

#SPJ1

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