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motikmotik
3 years ago
12

I need help please????

Mathematics
2 answers:
UkoKoshka [18]3 years ago
7 0

Answer:

The correct answer is option B.  19

Step-by-step explanation:

Fro the figure we can see that,

the number of students across number of answers

<u>To find students correctly answered 30 more questions</u>

From the figure we get,

The number of students answered 30 to 40 questions = 10

The number of students answered 40 to 50 questions = 9

Therefore the  students correctly answered 30 more questions = 10 + 9 = 19

The correct answer is option B.  19

sergeinik [125]3 years ago
4 0

Answer:

the answer is 19

Step-by-step explanation:

30< on the graph is shown on the scores line, the kids that had scores 30< were totaled to 10+9  which equals 19

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Answer:

  • The function is injective but nor surjective

Step-by-step explanation:

<u>We see that:</u>

  • f(x) = x³

<u>For any x₁ and x₂ ∈ N, </u>

  • f(x) = x₁³ = x₂³ ⇒ x₁ = x₂, both are natural numbers

It it confirmed one-to-one, hence it is injective

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f(x) = y ∈ N

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6 0
2 years ago
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Holly wants to save money for an emergency. Holly invests 1,500 in an account that pays an interest rate of 6.75%. How many year
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A=p (1+r)^t
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P present value 1500
R interest rate 0.0675
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7300/1500=1.0675^t
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T=24.2 years round your answer to get 24 years

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