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3 years ago

30 Labour s take 20 days to complete a work. How many labour must be added to complete the same work in 15 days?

Mathematics

1 answer:

Naya [18.7K]3 years ago

5 0

30 labours .... 20 days

x ........................15 days

x=(30×20)/15=2×20=40 labours.

Labours added: 40-30=10

Answer: 10 labours added.

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Is this a function or not. If it isn’t can someone explain

Snowcat [4.5K]

Answer:

Yes, it is.

Step-by-step explanation:

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3 years ago

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A student is trying to solve the system of two equations given below:

natima [27]

If you are going to eliminate the y term the y must be the same value but different signs

since the second equation has y, a value of 3 you mist make the first one -3 so you will multiply the whole equation by -3
c is the answer

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3 years ago

What is the volume of 22.5 g of metal with a density of 2.81 g/cm

xz_007 [3.2K]

Answer:V = 72.1 cm³ - 50.0 cm³ = 22.1 cm³

D = mV=99.7g22.1cm³ = 4.51 g/cm³

Step-by-step explanation:

d = mV

m = d×V

V = md

DENSITY

Density is defined as mass per unit volume.

d = mV

Example:

A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 g. What is its density?

Step 1: Calculate the volume

V = lwh = 10.0 cm × 10.0 cm × 2.00 cm = 200 cm³

Step 2: Calculate the density

d = mV = 433g200cm³ = 2.16 g/cm³

MASS

d = mV

We can rearrange this to get the expression for the mass.

m = d×V

Example:

If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass?

m = d×V = 500 mL × 1.11g1mL = 555 g

VOLUME

d = mV

We can rearrange this to get the expression for the volume.

V = md

Example:

What is the volume of a bar of gold that has a mass of 14.83 kg. The density of gold is 19.32 g/cm³.

Step 1: Convert kilograms to grams.

14.83 kg × 1000g1kg = 14 830 g

Step 2: Calculate the volume.

V = md = 14 830 g × 1cm³19.32g = 767.6 cm³

7 0

3 years ago

PLEASE ANSWER ASAP!

Mkey [24]

Answer:

$208804.96

Step-by-step explanation:

$4,000 plus the product of 8% and $2,560,062

answer = $208804.96

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3 years ago

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The mass of Earth is about 6 X 1024

storchak [24]

Answer:

Step-by-step explanation:

To do "how many times greater" problems, you divide. Think how you would answer this: How many times greater is 48 than 6? Dividing the larger 48 by the smaller 6 gives 8. 48 is 8 times greater than 6.

Do the same thing for these two masses.

6 x 10^24 divided by 7.4 x 10^22 is about 81.

The attached image shows a TI-83 display.

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2 years ago