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Kisachek [45]
3 years ago
6

a desert recipe calls for 3 cups of flour and 1 cup of sugar.It serves 4 people if the recipe must be altered to serve 12 people

, how many cups of flour Wil be needed
Mathematics
1 answer:
dolphi86 [110]3 years ago
6 0
4 times what=12
divide by 4
what=3

multiply everything by 3
originally we needed 3 cups flower
we ned 3 times of that or 3*3=9

9 cups needed
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The length of a rectangle is 7 more than the width the area is 744 square centimeters find length and width of rectangle
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Answer:

l=31\ cm\\\\w=24\ cm

Step-by-step explanation:

The formula that is used to calculate the area of a rectangle is:

A=lw

Where "l" is the lenght and "w" is the width.

You know that the area of that rectangle is:

A=744\ cm^2

And, according to the exercise, its lenght is 7 more than its width; then:

l=w+7

Then, you can make the corresponding substitution into the formula A=lw:

 744=(w+7)w

Simplify:

744=w^2+7w\\\\w^2+7w-744=0

Factor the equation. Find two numbers whose sum is 7 and whose product is -744. These are 31 and -24.

Then, you get:

(w-24)(w+31)=0\\\\w_1=24\\\\w_2=-31

The width of the rectangle is the positive value:

w=24\ cm

Then, the lenght is:

l=24+7\\\\l=31\ cm

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