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andrew11 [14]
3 years ago
14

A school has three english classes. the first class has 26 students, the second class has 31 students and the last class has 28

students. four students will be selected from each class to attend a student government meeting. how many possible ways are there to select the students to attend the student government meeting?
Mathematics
1 answer:
aleksklad [387]3 years ago
8 0
3 ways. You can do 1 from the 26 class. 2 from the 31 and 1 from the 28 class
2 from the 26 class, 1 from the 31 class and 1 from the 28 class
2 from the 28 class, 1 from the 31 class and 1 from the 26 class
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I need help with this pls
antoniya [11.8K]
I'll explain it simply for you

1st question
Of course you know phythagoras theorm
You even wrote it up there
It states that the sum of the square of the two sides of an equilateral triangle is equal to the square of the hypotenuse
{a}^{2}  +  {b}^{2}   =  {c}^{2}
Where C is the hypotenuse
*NOTE* :
HYPOTENUSE is the greatest side in a triangle!!
And that's where your mistake is!
So you should take the greatest side as C
So in Q3. 7, 24 and 26 are the given numbers
You'll make the smaller two numbers a and b and the greatest number C
Using the Formula you'll solve the left side first which is
{a}^{2}  +  {b}^{2}
Then the right side which is
{c}^{2}

And if both are equal then it is a right triangle otherwise it isn't!
Let
a=7
b=24
c=26


a^2 + b^2
7^2 + 24^2
49 + 576 = 625
GREAT, Now the right side

26^2 = 676
Since they aren't equal it isn't a right angled triangle...

Then let
a=7.5
b=10
c=12.5

7.5^2 + 10^2
= 56.25 + 100
= 156.25



12.5^2 = 156.25

They are EQUAL
Therefore it is a right triangle too

Hopefully I helped
7 0
3 years ago
Differentiate y=xln(3x)​
Ganezh [65]

Answer:

Remove parentheses.

y=xln3x

2 Already solved. No work needed.

y=xln3x

the solution is in the picture above please mark me brainliest:)

6 0
3 years ago
Read 2 more answers
Pls help me! And explain how you found the answer pls
Dmitriy789 [7]

Answer:

y = \frac{1}{2} x - 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 22, - 14) and (x₂, y₂ ) = (- 18, - 12)

m = \frac{-12+14}{-18+22} = \frac{2}{4} = \frac{1}{2} , thus

y = \frac{1}{2} x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (- 18, - 12) , then

- 12 = - 9 + c ⇒ c = - 12 + 9 = - 3

y = \frac{1}{2} x - 3 ← equation of line

6 0
3 years ago
Find the surface area of this triangular prism.<br> 3 cm<br> 5 cm<br> 11 cm<br> 4 cm
blondinia [14]

Step-by-step explanation:

The area of a triangular pyramid is 5 cm.

5 0
3 years ago
What's the answer for this problem?
tiny-mole [99]
4%of 500 = 20

500  plus or minus 20 gives range as (480,520)
8 0
3 years ago
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