4 years ago

Use the area model to find the product of 21

Mathematics

1 answer:

vichka [17]4 years ago

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1/3 cup of flour is used in 5 dinner rolls. How many cups of flour are needed to make 3 dozen rolls?

gladu [14]

3 dozen=3·12=36

$\frac{1/3}{5} =\frac{x}{36}$

Use cross multiplication

1/3·36=5x

12=5x

12/5=5x/5

x=12/5 or 2 2/5 or 2.4

12/5 or 2 2/5 cups of flour is needed to make 3 dozen rolls

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3 years ago

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A school cafeteria makes cheese sauce for macaroni using 15 cups of Swiss cheese and 17 cups of cheddar cheese. Perry tries to m

ioda

No. In order to make the ratio correct you would need to divide both numbers of original recipe by the same number. 15/3=5 but 17/3 is not equal to 7

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3 years ago

Five times a number is 40. What is the number?<br> equation: <br><br><br> n =

Neko [114]

5n = 40
n = 8 (Divide everything by five)

If you need further help just ask.

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3 years ago

What is 3x + 9 = 2.5x + 14?

Rus_ich [418]

3x+9=2.5x+14. =>

0.5x=5 => x=10.

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14) At a school 5/8 of the teachers are male

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If 5/8 of the teachers are males, there are 45 male teachers.

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