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nignag [31]
2 years ago
5

Age 11

Mathematics
1 answer:
wolverine [178]2 years ago
7 0

Using the probability concept, it is found that there is a \frac{2}{5} probability the student is a boy.

<h3>What is a probability?</h3>
  • A <em>probability </em>is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

In this problem, according to the two-way table found on the internet when we research the problem:

  • There are 11 people who are 12, of which 4 are girls and 7 are boys.
  • Hence, in total, there are 21 people, of which 13 are girls and 8 are boys.
  • Then, we find that there are 10 people aged 11, of which 6 are girls and 4 are boys.

Then:

p = \frac{4}{10} = \frac{2}{5}

There is a \frac{2}{5} probability the student is a boy.

You can learn more about the probability concept at brainly.com/question/15536019

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Which trigonometric functions are negative in the fourth (IV) quadrant?
anzhelika [568]
<h3>Answers are: sine, tangent, cosecant, cotangent</h3>

Explanation:

On the unit circle we have some point (x,y) such that x = cos(theta) and y = sin(theta). The sine corresponds to the y coordinate of the point on the circle. Quadrant IV is below the x axis which explains why sine is negative here, since y < 0 here.

Since sine is negative, so is cosecant as this is the reciprocal of sine

csc = 1/sin

In quadrant IV, cosine is positive as x > 0 here. So the ratio tan = sin/cos is going to be negative. We have a negative over a positive when we divide.

Because tangent is negative, so is cotangent.

The only positive functions in Q4 are cosine and secant, which is because sec = 1/cos.

7 0
2 years ago
Plz help me due today
Blababa [14]

Answer:

2976 in³

Step-by-step explanation:

Stool volume = upper smaller prism + Lower bigger prism

Stool volume = 8 x 6 x 12 + 20 x 12 x 10 = 576 + 2400 = 2976

check: volume = 20 x 12 x 16 - 12 x 12 x 6 = 2976

3 0
2 years ago
Simplify (5 +1)2 — (12 + 32) + 3
Alinara [238K]

Step-by-step explanation:

=( 5 + 1 )2 - ( 12 + 32 ) + 3

=6 * 2 - 44 + 3

=12 - 44 + 3

= -29

3 0
3 years ago
Read 2 more answers
If x &gt; 0 and y &gt; 0, where is the<br> point (x, y) located?
Scrat [10]
  • Given, x > 0, y > 0.
  • So, the values of x and y are less than 0, that means, they are negative integers.
  • If we divide a Cartesian plane with the x-axis and y-axis, we get four quadrants.
  • 1st Quadrant : (+,+)
  • 2nd Quadrant : (-,+)
  • 3rd Quadrant : (-,-)
  • 4th Quadrant : (+,-)
  • Since the values of x and y are both negative, so (x, y) is located in the <em><u>3rd Quadrant</u></em>.

Hope you could get an idea from here.

Doubt clarification - use comment section

8 0
2 years ago
Which are true of the function f(x) = 49(1/7)^x Check all that apply.
Karolina [17]

The given function is : y= f(x) =49 [\frac{1}{7}]^x

The statements which are true regarding this function is  

1. As you can observe that y is defined for all values of x , so Domain is set of all values that x can take which is set of all real numbers.

2. Also, x =\frac {\log[\frac{y}{49}]}{-\log7}, so x is defined for all values of y. Range is all values that y can take which is also set of all real numbers greater than zero, i.e y>0.

As ,x =0 then y= 49 and x_{1} =1 then y_{1}  = 7,

so ,y_{1} = \frac{y}{7}.

So, Option (1),(4) and (5) are correct.

8 0
2 years ago
Read 2 more answers
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