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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The graph shows the relationship between mass and volume for pure silver. Use the graph to determine the density of pure silver

Natalija [7]

Answer:

C. Slope and $10.49 g/cm^3$

Step-by-step explanation:

We're missing the graph itself, but I can make an educated guess:

- Assuming x = volume and y = mass:

$p = \frac{m}{v}$

density = mass/volume

x = volume = run

y = mass = rise

mass/volume = rise/run = slope

The slope of the line (assuming the graph is purely linear) represents mass/volume, which is the formula for density.

I had to Google the density of silver itself. Do the math from the graph for a more appropriate answer, as the graph may be less scientifically precise.

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4 years ago

Calvin has 13 coins , all of which are quarters and nickels. The coins are worth $2.45. How many of each coin does Calvin have ?

zalisa [80]

Answer:

Step-by-step explanation:

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3 years ago

Given: △ABC, m∠A=60° m∠C=45°, AB=8 Find: Perimeter of △ABC, Area of △ABC

jarptica [38.1K]

We are given

△ABC, m∠A=60° m∠C=45°, AB=8

Firstly, we will find all angles and sides

Calculation of angle B:

we know that sum of all angles is 180

m∠A+ m∠B+m∠C=180

we can plug values

60°+ m∠B+45°=180

m∠B=75°

Calculation of BC:

we can use law of sines

$\frac{AB}{sin(C)}=\frac{BC}{sin(A)}$

now, we can plug values

$\frac{8}{sin(45)}=\frac{BC}{sin(60)}$

$BC=\frac{8}{sin(45)} \times sin(60)$

$BC=9.798$

Calculation of AC:

$\frac{AB}{sin(C)}=\frac{AC}{sin(B)}$

now, we can plug values

$\frac{8}{sin(45)}=\frac{AC}{sin(75)}$

$AC=\frac{8}{sin(45)} \times sin(75)$

$AC=10.928$

Perimeter:

$p=AB+BC+AC$

we can plug values

$p=10.928+8+9.798$

$p=28.726$

Area:

we can use formula

$A=\frac{1}{2}AB \times AC \times sin(A)$

now, we can plug values

$A=\frac{1}{2}8 \times 10.928 \times sin(60)$

$A=37.85570$ ...............Answer

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4 years ago

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Degger [83]

Answer:

1) 0.75

2) y = $\frac{3}{4}$ x - 3

3) (4, 0); (0, -3)

Step-by-step explanation:

Convert to slope-intercept form (y = mx + b) by solving:

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To find the x and y intercepts, set the y value to zero and solve (x-intercept), and b is the y-intercept.

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3 years ago

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Umnica [9.8K]

The answer would be 303.62 if I’m not mistaken

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4 years ago