Combine like terms. -5x - 3x +7x Question 5 options: 15x -x x 9x
2 answers:
QUESTION 5
The given expression is
All of these are like terms because all of them contain .
Let us combine the first two terms to obtain an expression which is
We finally simplify to obtain an expression which is
The correct answer is B
QUESTION 6
The given expression is
All the terms in the expression are like terms because they contain .
We combine the first three terms to obtain an expression which is
We finally simplify to obtain an equivalent expression which is
The correct answer is B
QUESTION 7
The given expression is
All the terms in the given expression are like terms because they all contain .
We combine the first two terms to obtain an equivalent expression which is
We again combine the first two terms to obtain an equivalent expression which is
We finally simplify to obtain an expression which is
The correct answer is A
QUESTION 8
The given expression is
The first two terms in the expression are like terms because they contain . The last two terms in the expression are also like terms because they contain
.
When we combine the first two terms we obtain an equivalent expression which is
When we again combine the last two terms we obtain an equivalent expression which is
This final expression cannot be combined again because they are not like terms.
Therefore the correct answer is D
QUESTION 9
The given expression is
We group like terms to obtain,
We combine the first three terms to obtain,
We combine the middle two terms to obtain,
The correct answer is B
QUESTION 10
The given expression is
We group like terms to obtain an equivalent expression which is
We combine the first three terms to get,
We now combine the last two terms to get,
The correct answer is A
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