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gladu [14]
3 years ago
11

There are 9 girls and 11 boys in a class, and two students will be chosen one after another. Find the probability that both are

boys.
Mathematics
1 answer:
ddd [48]3 years ago
3 0

Answer:

11/20

Step-by-step explanation:

total=20

11=boys

9=girls

p(b)=11/20

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Is the length of your classroom greater than or less than one kilometer?
Y_Kistochka [10]
That would depend on the size of your classroom. but, typically the answer is no
3 0
3 years ago
Read 2 more answers
Given that <br> y<br> = 10 cm and <br> θ<br> = 55°, work out <br> x<br> rounded to 1 DP.
ElenaW [278]

Answer:

x=8.2

Step-by-step explanation:

First, figure out which trig function you are going to use.

In this problem you are dealing with the opposite side to the angle and the hypotenuse, and if you remember SOH CAH TOA, this requires sine.

sin (55) =opposite/hypotenuse

sin (55) =x/10

multiply both sides by 10 to get 10 * sin (55) = x

10 * sin (55) = 8.2

5 0
2 years ago
NEED HELP 6th GRADE MATH PLEASE HELP ASAP THIS IS A LATE ASSIGNMENT
lara [203]

Answer:

± 42.25

Step-by-step explanation:

±6.5^2 = ±42.25

7 0
3 years ago
Find two numbers whose sum is 64 and whose difference is 42
vovangra [49]
These numbers are  "a"  and "b".  
Sum is 64,  so  a+b=64
Difference  is 42  so  a-b=42
So you've got:
+\begin{cases} a+b=64 \\ a-b=42\end{cases} \\ \overline{, \quad2a \quad \ = \ 106} \qquad /:2 \\ a=53
When a+b=64 and a=53  you've got:
53+b=64
b=11

So these numbers is 53 and 11. 

4 0
3 years ago
The side length of each square is 6 units. Find the areas of the inscribed shapes.
kirill [66]

By using subtraction of <em>yellow</em> areas from the <em>entire</em> squares, the areas of the <em>inscribed</em> shapes are listed below:

  1. 18 units
  2. 20 units
  3. 12 units
  4. 12 units

<h3>How to calculate the areas of the inscribed shapes</h3>

The areas of the <em>inscribed</em> shapes can be easily found by subtracting the <em>yellow</em> areas from the square, in order to find the value of <em>green</em> areas. Now we proceed to find the result for each case by using <em>area</em> formulae for triangles:

Case A

A = 6² - 0.5 · (3) · (6) - 0.5 · (3) · (6)

A = 36 - 18

A = 18 units

Case B

A = 6² - 4 · 0.5 · (2) · (4)

A = 36 - 16

A = 20 units

Case C

A = 6² - 0.5 · 6² - 0.5 · 6 · 2

A = 36 - 18 - 6

A = 12 units

Case D

A = 6² - 2 · 0.5 · 6 · 4

A = 36 - 24

A = 12 units

To learn more on inscribed areas: brainly.com/question/22964077

#SPJ1

4 0
2 years ago
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