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2 years ago

A bake sale earns 80$ from selling 50 brownies. Each brownie cost the same amount. How much was 1 brownie?

Mathematics

2 answers:

ch4aika [34]2 years ago

7 0

Answer:

cost of one brownie is $1.60

Step-by-step explanation:

<h2><u>Cost of one brownie</u></h2>

$80 from selling 50 brownies

we can create a ratio

80 : 50

x : 1

we can use cross multiplication to solve this:

80 = 50x

80/50 = x

x = $1.60

<h3><u>cost of one brownie is $1.60</u></h3>

Nataly [62]2 years ago

3 0

$1.60
Divide 80 by 50 to find the cost of one brownie which will then lead you to get you the answer of $1.60

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1) $n = 84$

2) $n = 78$

3) $n = 24$

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5) $n = 35$

Step-by-step explanation:

To solve each proportion, we apply cross multiplication.

Question 1:

$\frac{5}{12} = \frac{35}{n}$

$5n = 35*12$

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Question 2:

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Simplifying both sides by 20

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Simplifying by 3

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Question 3:

$\frac{18}{n} = \frac{21}{28}$

$21n = 18*28$

Simplifying both sides by 7

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Simplifying both sides by 3

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Question 4:

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Question 5:

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3 years ago

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Step-by-step explanation:

x and (3x + 10) combine to form a right angle, shown in the diagram by the small square joining the perpendicular lines.

Right angles are 90 degrees, so you can add both angles to get 90:

$x + (3x + 10) = 90\\\\4x + 10 = 90\\\\4x = 80\\\\x = 20$

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2 years ago