The equivalent expression of is
Step-by-step explanation:
We need to combine like terms to create an equivalent expression. The given expression is:
Like terms:
Like terms are those terms that have the same variables and same exponents.
In the given expression 2/5 m and -3/5 m are like terms.
Combining like terms:
The equivalent expression of is
Keywords: Like Terms
Learn more about Like terms at:
#learnwithBrainly
Answer:
There are 32 pupils in the class
Step-by-step explanation:
Let's say there are N pupils in the class. Then each pupil must send N-1 cards - because it would make no sense to send one to themselves! So each of the N pupils send N-1 cards, which becomes 992 cards in total. In equation form, this is
This is a second degree polynomial, which has the solutions
where
If we insert these numbers in the equation,
If we choose the solution with the minus sign, we get
N=-31
but this makes no sense! There can't be a negative number of pupils in the class!
So we choose the solution with the plus sign,
So there are 32 pupils in the class
Explanation is in a file
bit.ly/3gVQKw3