1) x + 7
2) 2x - 6
3) 12x-²
4) 7x² + 6x
Step-by-step explanation:
Word Problems Involving
Algebraic Expression
An algebraic expression refers to a
combination of constant, variables and
algebraic operations. The constant is
the known value and does not change
its value. The variable is a symbol or
letter, such as "x" or "y," that represents
an unknown value. Then, the operation
refers to the four basic operations:
addition, subtraction, multiplication and
division.
Let us now answer the given word
problems above by representing them in
algebraic expression.
1) Zab is x years old now. What is his age
7 years from now?
Let "x" be Zab's age now.
Since it is asking for his age 7 years from
now, add 7 to x.
Final Answer:
x + 7
2) Joan is twice as old as her sister now.
What is her age 6 years ago?
Let "x" be Joan's sister age.
"2x" be Joan's age since her age is twice
her sister's.
It is asking for Joan's age 6 years ago, so
take away 6 from Joan's age.
2x-6
3) A square has a said 3x“², what is the
perimeter?
The perimeter of a square can be found
by multiplying its side by 4, since square
has four sides.
P = 4(3x-²)
= 12x-²
12x’²
4.) His income is 7x +6 everyday. What is his total incomr in x days?
To find his total income in x days, multiply the number of day by his income everyday.
x(7x +6)
=7x² + 6x
7x² + 6x
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Answers & Comments
1) x + 7
2) 2x - 6
3) 12x-²
4) 7x² + 6x
Step-by-step explanation:
Word Problems Involving
Algebraic Expression
An algebraic expression refers to a
combination of constant, variables and
algebraic operations. The constant is
the known value and does not change
its value. The variable is a symbol or
letter, such as "x" or "y," that represents
an unknown value. Then, the operation
refers to the four basic operations:
addition, subtraction, multiplication and
division.
Let us now answer the given word
problems above by representing them in
algebraic expression.
1) Zab is x years old now. What is his age
7 years from now?
Let "x" be Zab's age now.
Since it is asking for his age 7 years from
now, add 7 to x.
Final Answer:
x + 7
2) Joan is twice as old as her sister now.
What is her age 6 years ago?
Let "x" be Joan's sister age.
"2x" be Joan's age since her age is twice
her sister's.
It is asking for Joan's age 6 years ago, so
take away 6 from Joan's age.
Final Answer:
2x-6
3) A square has a said 3x“², what is the
perimeter?
The perimeter of a square can be found
by multiplying its side by 4, since square
has four sides.
P = 4(3x-²)
= 12x-²
Final Answer:
12x’²
4.) His income is 7x +6 everyday. What is his total incomr in x days?
To find his total income in x days, multiply the number of day by his income everyday.
x(7x +6)
=7x² + 6x
Final Answer:
7x² + 6x