Question

Write an English phrase that would translate into the following mathematical expression.3(3-9)Which of the following is equivalent to the expression 3(z-9)?O A. 3 less than the product of 9 and a number zO B. 9 less than 3 times a number zO C. The quotient of 3 times a number z and 9D. 3 times the difference of a number z and 9

Answer 1

The expression

`3(z-9)`

Involves two operations:

- a multiplication, or the product, of two amounts: 3 and (z-9)

- a substraction of 9 from z

So, in phrases, we can say the substracion as "the difference of a number z and 9", which is equivalent to remove 9 from a number z. The multiplication we can say "3 times something".

Putting them together, we have:

"3 times the difference of a number z and 9", which corresponds to option D.