All categories

3 years ago

If a litre of water is provided for 20 people, how much for 50 people?

Mathematics

2 answers:

SCORPION-xisa [38]3 years ago

8 0

Answer:

2.5 L

Step-by-step explanation:

We use a rule of three to solve this problem, the information we have is represented as follows:

Liters People

1 ⇒ 20

x ⇒ 50

x represents the unknown quantity, the liters that correspond to 50 people.

The way x is found is as follows: We multiply the cross quantities and divide by the remaining quantity.

$x=\frac{50*1}{20}\\ x=2.5$

Thus, for 50 people is provided 2.5 liters of water

Vinvika [58]3 years ago

7 0

2 1/2 litres would be a reasonable amount of water assuming everyone drinks the same amount.

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Someone please help

dedylja [7]

Answer:

1. y = -2x + 5

2. y = 3/5x + 5

3. y = -4/5x - 4

4. y = - 1

5. yes

6. yes

7. yes

8. no

Step-by-step explanation:

1. (4,-3) parallel to y= -2x

-3 = -2(4)+b

b=5

2. (-5,2) parallel to y = 3/5x

2= 3/5(-5)+b

b=5

3. (-5,0) -4/5x

0 = -4/5(-5)+b

b = -4

4. (-4,-1)

y= -1

5. yes

6. yes

7. yes

8. no

Same slope = parallel ex. y = -5x +7, y = -5x +12
opposite reciprocal = perpendicular ex. y = -5x +7, y = 1/5x + 12
to find "b" with slope and point

(x,y) y = mx + b

plug in the y value and x value in the eqaution and m=slope, solve for b

7 0

2 years ago

What is x in the equation -3(7-2x)+3=8x-10

damaskus [11]

Answer:

x=-4

Step-by-step explanation:

−3(7−2x)+3=8x−10

Step 1: Simplify both sides of the equation.

−3(7−2x)+3=8x−10

(−3)(7)+(−3)(−2x)+3=8x+−10(Distribute)

−21+6x+3=8x+−10

(6x)+(−21+3)=8x−10(Combine Like Terms)

6x+−18=8x−10

6x−18=8x−10

Step 2: Subtract 8x from both sides.

6x−18−8x=8x−10−8x

−2x−18=−10

Step 3: Add 18 to both sides.

−2x−18+18=−10+18

−2x=8

Step 4: Divide both sides by -2.

−2x

−2

x=−4

4 0

3 years ago

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If 588 digits were used to number the pages of a book, how many pages are in this book?

gregori [183]

Answer:

294 pages are in this book

Step-by-step explanation:

4 0

3 years ago

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Rafael plans to watch 2 movies each month. Write an equation to represent the total number of movies n that he will watch in m m

vladimir1956 [14]

Answer:What is m?

Step-by-step explanation:

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3 years ago

A = √7 + √c and b = √63 + √d where c and d are positive integers.

mrs_skeptik [129]

Answer:

$\displaystyle a:b=\frac{1}{3}$

Step-by-step explanation:

<u>Ratios </u>

We are given the following relations:

$a=\sqrt{7}+\sqrt{c}\qquad \qquad[1]$

$b=\sqrt{63}+\sqrt{d}\qquad \qquad[2]$

$\displaystyle \frac{c}{d}=\frac{1}{9} \qquad \qquad [3]$

From [3]:

$9c=d$

Replacing into [2]:

$b=\sqrt{63}+\sqrt{9c}$

We can express 63=9*7:

$b=\sqrt{9*7}+\sqrt{9c}$

Taking the square root of 9:

$b=3\sqrt{7}+3\sqrt{c}$

Factoring:

$b=3(\sqrt{7}+\sqrt{c})$

Find the ration a:b:

$\displaystyle a:b=\frac{\sqrt{7}+\sqrt{c}}{3(\sqrt{7}+\sqrt{c})}$

Simplifying:

$\boxed{a:b=\frac{1}{3}}$

3 0

3 years ago