options: Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them). For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for.

Apply the properties of operations to generate equivalent expressions. For example, apply the distributive property to the expression 3 (2 + x) to produce the equivalent expression 6 + 3x; apply the distributive property to the expression 24x + 18y to produce the equivalent expression 6 (4x + 3y); apply properties of operations to y + y + y to produce the equivalent expression 3y.

Write and evaluate numerical expressions involving whole-number exponents.

Write, read, and evaluate expressions in which letters stand for numbers.
problem_activity: For each verbal expression below, write an algebraic expression.
a.   Four times the difference of 8 and
$$x$$
.
b.   Twice
$$m$$
increased by the square of
$$n$$
.
c.   The sum of 10 and the quotient of
$$x$$
and 4.
d.   The product of the square of
$$n$$
and
$$m$$
, subtracted from 5.


correct_option_index: 3