Question

What's the algebraic expression of "4 times a number cubed decreased by 7"?

Answer 1

Answer:

Statement:  "4 times a number cubed decreased by 7"

Let a number be  x is denoted as an arbitrary variable.

Now, cubed means raise x to the third power  i.e $x^3$

then, 4 times a number cubed i.e $4x^3$

Decreased by 7 means, subtract 7  

⇒$4x^3-7$

Therefore, the algebraic expression for the given statement is, $4x^3-7$

Answer 2

Take the variable to be x

4x^3-7