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otez555 [7]
3 years ago
14

There are 20 students in the classroom. 5 of these students are selected to go to an assembly. how many such selections are poss

ible?
Mathematics
1 answer:
Ksju [112]3 years ago
4 0
Order of the people does not affect the total number of ways. Thus, we use combinations.

Total combinations: 20C5 = 15,504 ways.
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If it says to evaluate an expression, does it mean to answer it?
Fed [463]
Evaluating an expression means either to solve the expressions or to simply it.

Solving an expression:

2 - (10 + 5)

A simply expression. After doing the math the answer comes out as -3.

2x + 3x

This is an algebraic expression. This means we have variables like x and y.
 In this case, we can only simplify it. Because we don't know what x is equal to.

Because they are like terms (which means they have the variable) we can add them to together.

2x + 3x = 5x

I hope this answer clears up any misunderstandings about expressions and over all helped you learn something! If you still need some help, don't hesitate to DM on Brainly! I wish you best of luck on your journey of math!

EDIT:

Now what if you have an expression like this:

5x + 5m where x=4 and m=8

In mathematics, something like 5x is the same difference as 5 * x.
And x is just a placeholder for a number or for another variable.

And in this equation, x is equal to 4. So, we just replace x with 4.

5(4) + 5m

Same this with m. The variable m is equal to 8.

5(4) + 5(8)

We can solve!

5(4) + 5(8) = 20 + 40 = 60

Our answer is 60.
8 0
3 years ago
Read 2 more answers
What is the circumstance of the circle
Alex_Xolod [135]
Answer: Circumference = 25.12

Explanation:

Circumference = pi x d

C = 3.14 x 8
C = 25.12
8 0
2 years ago
Read 2 more answers
Find the missing side. Round your<br> answer to the nearest tenth.<br> 68 degrees <br> x<br> 28 in
EastWind [94]
1904° i think i’m pretty sure
3 0
3 years ago
Please help brainliest if correct
german

Answer: H

Step-by-step explanation:

7% of 21 is 1.47

5 0
2 years ago
Read 2 more answers
2x5x1742x2133+12/4= PlS hellllp
Fynjy0 [20]

Answer:

37,156,863

Step-by-step explanation:

2 x 5 x 1742 x 2133 + 12/4 =

10 x 1742 x 2133 +12/4 =

17420 x 2133 + 3=

37,156,860 + 3 =

37,156,863

8 0
3 years ago
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