Question

Which is a word phrase for the variable expression?



3(n – 1)



A.


three times the difference of a number n and 1


B.


three times the quotient of a number n and 1


C.


one less than the product 3 and a number n


D.


three more than the difference of a number n and 1

Answer 1

@e.cociuba

Answer 2

Which do you think it is?

Answer 3

@LauraWest

Answer 4

Lets look at c: one less than the product 3 and a number n

one less than {something} means {something}-1

The product of 3 and a number n means 3n

So one less than the product 3 and a number n means:

3n-1

Answer 5

So do you want to try again?

Answer 6

a

Answer 7

Lets look at a: three times the difference of a number n and 1

The difference of a number n and 1 is n-1
Three times {something} is 3{something}

So three times the difference of a number n and 1 is.......

3(n-1)

Get it? :)

Answer 8

B and C aren't the right answers because b is talking about quotients which is dividing and you don't have that. C is talking about products, which is multiplying, and something you also don't have. So we're left with A and D. D is wrong because it says:

three more than the difference of a number n and 1, which translates into (n-1) + 3 not 3(n-1)..

That means your answer is A, three times the difference of a number n and 1

3 x (n minus 1) = 3(n-1)

A

Hope that helps!

Answer 9

*Which is something you don't have in the parenthesis* = Typo.

Answer 10

@kate555 , can you do these?

Write an expression for:

a. 5 times the sum of 10 and z
b. The difference between 2 and the quotient of 7 and x

Answer 11

ok thx