Question

In the first picture can you please answer all of them in order I'm not sure if my answers are correct.

Answer 1

The number of cookies packs needed if the treasurer buys 1 package of brownies bites is 5 packs

Equation

• Total attendance = 75 people
• Cookies in each pack = 12
• Brownies in each pack = 15
• Number of cookies pack = c
• Number of brownies pack = b

15b + 12c = 75

If 1 package of brownies is bought

15b + 12c = 75

15(1) + 12c = 75

15 + 12c = 75

12c = 75 - 15

12c = 60

c = 60/12

c = 5 packs

• It is a reasonable value in this context

If 9 packages of brownies are bought

15b + 12c = 75

15(9) + 12c = 75

135 + 12c = 75

12c = 75 - 135

12c = -60

c = -60/12

c = -5 packs

• The value is not reasonable in this context

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