3 years ago

Madison has $1. She spent $0.90. What percent of a dollar did she spend?

Mathematics

2 answers:

Readme [11.4K]3 years ago

8 0

She spent 90% good luck

myrzilka [38]3 years ago

3 0

She spent 90% because $1.00 would be 100% and $0.80 would be 80% so $0.90 equals 90%

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aliya0001 [1]

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Step-by-step explanation:

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bazaltina [42]

One sub costs $4.5 and one cookie costs $0.75 or 75 cents

Step-by-step explanation:

Let s be the cost of one sub

and

c be the cost of one cookie

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$3s+7c = 18.75\ \ \ Eqn\ 1$

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$5s+21c = 38.25\ \ \ \ Eqn\ 2$

Multiplying eqn 1 by 3

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Subtracting Eqn 2 from Eqn 3

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Dividing both sides by 4

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Putting s=4.5 in Eqn 1

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Dividing both sides by 7

$\frac{7c}{7}=\frac{5.25}{7}\\c = 0.75$

So,

One sub costs $4.5 and one cookie costs $0.75 or 75 cents

Keywords: Linear Equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

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