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Aneli [31]
3 years ago
5

sara has a recipe for a cake that her mother gave her. the recipe calls for 3/4 cups of sugar for each cake. sara and her friend

cindy are making 3 cakes instead of one. sara is telling cindy that they will need 9 cups of sugar. explain in words on your paper why sara is right or wrong using a convincing argument. to make 3 cakes how much sugar will they need?
Mathematics
2 answers:
serg [7]3 years ago
7 0
Sarah is wrong because 3/4 x 3=9/4 or 2 1/4
aniked [119]3 years ago
6 0

Sara is wrong because making 3 cakes instead of 1 would require 2 1/4 cups of sugar. The original 3/4 cups of sugar would be multiplied by 3 (3/1 x 3/4) which would be 9/4, or 2 1/4, cups.

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Let x be the cost of 1 shirt and y be the cost of 1 scarf.

Since, 3 shirts and 2 scarves cost $94, we have,

3x + 2y = 94

Since the number of unknowns is greater than the number of equations (2 > 1), the above system has infinitely many solutions.

If t is the cost of 1 scarf, then

3x + 2t = 94

3x = 94 - 2t

x = \frac{94-2t}{3}

For different values for t, we will get different values for x.

Set t = 2.

Then, x = \frac{94-2(2)}{3}

= \frac{94-4}{3}

= \frac{90}{3}

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So, if the cost of 1 scarf is $2, then the cost of 1 shirt is $30.


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3 years ago
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leonid [27]

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Step-by-step explanation:

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Answer:

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