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3 years ago

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Mathematics

1 answer:

ololo11 [35]3 years ago

3 0

Answer:

um... the.... second... one...? and nice Jake picture

Step-by-step explanation:

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All the fourth-graders in a certain elementary school took a standardized test. A total of 85% of the students were found to be

Aneli [31]

Answer:

There is a 2% probability that the student is proficient in neither reading nor mathematics.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that a student is proficient in reading

B is the probability that a student is proficient in mathematics.

C is the probability that a student is proficient in neither reading nor mathematics.

We have that:

$A = a + (A \cap B)$

In which a is the probability that a student is proficient in reading but not mathematics and $A \cap B$ is the probability that a student is proficient in both reading and mathematics.

By the same logic, we have that:

$B = b + (A \cap B)$

Either a student in proficient in at least one of reading or mathematics, or a student is proficient in neither of those. The sum of the probabilities of these events is decimal 1. So

$(A \cup B) + C = 1$

In which

$(A \cup B) = a + b + (A \cap B)$

65% were found to be proficient in both reading and mathematics.

This means that $A \cap B = 0.65$

78% were found to be proficient in mathematics

This means that $B = 0.78$

$B = b + (A \cap B)$

$0.78 = b + 0.65$

$b = 0.13$

85% of the students were found to be proficient in reading

This means that $A = 0.85$

$A = a + (A \cap B)$

$0.85 = a + 0.65$

$a = 0.20$

Proficient in at least one:

$(A \cup B) = a + b + (A \cap B) = 0.20 + 0.13 + 0.65 = 0.98$

What is the probability that the student is proficient in neither reading nor mathematics?

$(A \cup B) + C = 1$

$C = 1 - (A \cup B) = 1 - 0.98 = 0.02$

There is a 2% probability that the student is proficient in neither reading nor mathematics.

6 0

3 years ago

Jason can make 7 origami cranes in 10 minutes. How many minutes will it take to make 1505 origami cranes

Angelina_Jolie [31]

Answer:

The unit rate = 7/10 cranes per minute

Step-by-step explanation:

So, the number of minutes would it would take Kenny to fold 1505 cranes is

10/7 x 1505 = 2150 minutes

2150/60 = 35 5/6 hours

8 0

2 years ago

Read 2 more answers

Mapping diagram: Is it a function? (yes /<br> no<br> ) Why or why not?

sashaice [31]

<h3>It is a function</h3>

Why? Because each input maps to <u>exactly one</u> output. The input oval represents the domain (set of all possible inputs). The output oval is the range, which is the set of all possible outputs. If we had something like the input 0 mapping to the outputs 2 and 4 at the same time, then we wouldn't have a function.

5 0

2 years ago

Eliott was trying to factor 6x^2-18 . He found that the greatest common factor of these terms was 6 and made an area model:

Semenov [28]

x²-3

Step-by-step explanation:

The expression given is;

6x²-18

Finding the greatest common factor of the terms and simplifying the expression will be;

Divide the terms by 6 to get;

x²-3

Graphing the expression to find the area model will be as attached;

Learn More

Factorizing expressions:brainly.com/question/12290978

Keywords : factor, greatest common factor, terms, area model

#LearnwithBrainly

4 0

3 years ago

X=<br> Enter the number that belongs in the green box.

Marat540 [252]

<em>72 degrees</em>

<em>When the transversal cuts through, the angles are now the same (I forgot the term).</em>

<h3>I am pretty sure this is the answer! Correct me if I'm wrong!!</h3>

8 0

3 years ago