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Jack has 9c sweets in a bag. He eats 2c sweets. a) Write a simplified expression to say how many sweets Jack has left. b) How many does he have left if c = 3?​

User Jayabal
by
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2 Answers

2 votes

a) The simplified expression to represent the number of sweets Jack has left after eating 2c sweets is:
\displaystyle 9c-2c.

b) To find how many sweets Jack has left if
\displaystyle c=3, we substitute
\displaystyle c=3 into the expression:
\displaystyle 9(3)-2(3)=27-6=21.

Therefore, if
\displaystyle c=3, Jack has 21 sweets left.


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User William Rossier
by
8.2k points
0 votes

Answers:

(a) 7c

(b) 21

============================

Step-by-step explanation:

Start with 9c and subtract off 2c to get 9c-2c = 7c.

We can think of it like 9 candies - 2 candies = 7 candies. Replace each "candies" with "c" so things are shortened.

Afterward, plug in c = 3 to find that 7c = 7*3 = 21

User Greig
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