mne762925
contestada

Which of these expressions requires a variable?

A
the expression for how much money Abe earns when he makes $15 an hour and works for three hours

B
the expression for the number of pencils Cody has if he starts with nine pencils and then gives four to Molly

C
the expression for the total number of cakes when Cindy brings one cake to class, and Bryan brings two cakes to class

D
the expression for how many birthday parties Pia has this June if she has one more birthday party than her brother

Respuesta :

rohitboddugari
D. there is no numbers to work with so you just have to use a variable

The expression for how many birthday parties Pia has this June if she had one more birthday party than her brother.

What is a variable?

'A variable in Mathematics is defined as the alphabetic character that expresses a numerical value or a number.'

According to the given problem,

For the first three options, we do not need a variable because all the values are given.

For option A - Abe will make $(15 × 3) by working for 3 hours.

For option B - Cody will have (9 - 4) pencils left.

For option C - Total number of cakes are (1 + 3)

But, for option D - We do not know the number of parties Pia's brother has attended.

Therefore, we can assume x to be the number of parties Pia's brother has attended. Pia will attend (x + 1) parties. We can solve for the variable x to find out the number of parties Pia and her brother has attended.

Hence, we can conclude that expression for option D requires a variable.

Learn more about variable here:

https://brainly.com/question/19585043

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