Respuesta :
QUESTION 5
The given expression is
[tex]-5x-3x+7x[/tex]
All of these are like terms because all of them contain [tex]x[/tex].
Let us combine the first two terms to obtain an expression which is
[tex]=-8x+7x[/tex]
We finally simplify to obtain an expression which is
[tex]=-x[/tex]
The correct answer is B
QUESTION 6
The given expression is
[tex]x+x+x-10x[/tex]
All the terms in the expression are like terms because they contain [tex]x[/tex].
We combine the first three terms to obtain an expression which is
[tex]=3x-10x[/tex]
We finally simplify to obtain an equivalent expression which is
[tex]=-7x[/tex]
The correct answer is B
QUESTION 7
The given expression is
[tex]8t-9t+4t-12t[/tex]
All the terms in the given expression are like terms because they all contain [tex]t[/tex].
We combine the first two terms to obtain an equivalent expression which is
[tex]=-t+4t-12t[/tex]
We again combine the first two terms to obtain an equivalent expression which is
[tex]=3t-12t[/tex]
We finally simplify to obtain an expression which is
[tex]=-9t[/tex]
The correct answer is A
QUESTION 8
The given expression is
[tex]x+4x-6y+7y[/tex]
The first two terms in the expression are like terms because they contain [tex]x[/tex]. The last two terms in the expression are also like terms because they contain [tex]y[/tex].
When we combine the first two terms we obtain an equivalent expression which is
[tex]=5x-6y+7y[/tex]
When we again combine the last two terms we obtain an equivalent expression which is
[tex]=5x+y[/tex]
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
[tex]3ax+3x+5ax-x+5a+10ax[/tex]
We group like terms to obtain,
[tex]3ax+5ax+10ax+3x-x+5a[/tex]
We combine the first three terms to obtain,
[tex]18ax+3x-x+5a[/tex]
We combine the middle two terms to obtain,
[tex]18ax+2x+5a[/tex]
The correct answer is B
QUESTION 10
The given expression is
[tex]4m+6mn-2m-2mn+7m[/tex]
We group like terms to obtain an equivalent expression which is
[tex]=4m-2m+7m+6mn-2mn[/tex]
We combine the first three terms to get,
[tex]=9m+6mn-2mn[/tex]
We now combine the last two terms to get,
[tex]=9m+4mn[/tex]
The correct answer is A