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3 years ago

There are 3 girls for every 2 boy at a party. There are 20 boys at the party.how many girl are there

Mathematics

2 answers:

liubo4ka [24]3 years ago

7 0

Answer:

There are 30 girls at the party.

Step-by-step explanation:

20 / 2 = 10

10*3 = 30

You divide the 20 boys at the party from the "every 2 boys", and you should get 10.

You then multiply the 10 by 3, for the 3 girls at the party and you should get 30 as an answer, so therefore you should get 30 as your answer.

pogonyaev3 years ago

4 0

Answer:

there will be 30 girls at the party

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To find the product of (−2√20k)(5√8k3), first write using a single radical. Which expression is equivalent to the given product?

ad-work [718]

Answer:

Assuming the variable is included under the radical,

-40k²√(10)

Step-by-step explanation:

$(-2\sqrt{20k})(5\sqrt{8k^3})$

First we will simplify the first factor,

$-2\sqrt{20k}$

We will write 20 as a product of factors:

$-2\sqrt{4*5k}$

We know the square root of 2 is 2, so we pull a 2 out:

$-2(2)\sqrt{5k}\\\\=-4\sqrt{5k}$

Now we will simplify the second factor,

$5\sqrt{8k^3}$

We will rewrite 8 as a product of factors, as well as the variable:

$5\sqrt{2*4*k^2*k}$

The square root of 2 is 2, so we pull a 2 out. Additionally, the square root of k² is k, so we pull that out:

$5(2)(k)\sqrt{2k}\\\\=10k\sqrt{2k}$

This gives us the product

$(-4\sqrt{5k})(10k\sqrt{2k})$

Multiplying the coefficients, we have

$-4(10k)(\sqrt{5k})(\sqrt{2k})\\\\=-40k(\sqrt{5k})(\sqrt{2k})$

Multiplying the two radicals, we have

$-40k\sqrt{5k*2k}\\\\-40k\sqrt{10k^2}$

The square root of k² is k, so we pull a k out, leaving

$-40k(k)\sqrt{10}\\\\=-40k^2\sqrt{10}$

8 0

4 years ago

Read 2 more answers

Can anyone help me please and explain this: Write "60 pounds for $6.60" as a unit rate per ounce to the nearest tenth. 1 pound=

Pepsi [2]

1 pound = 16 ounces
so 60 pounds = 60 x 16 = 960 ounces.
$6.60/960 =0.006875 per ounce.
0.006875 x 16 ounces = 0.11 (11 cents per pound)

3 pounds x 0.11= 33 cents

answer is B

6 0

3 years ago

Which linear inequality is represented by the graph? O y>2/3x-2

DIA [1.3K]

Answer: x<6/2

Step-by-step explanation:

0y>2/3 x-2

You want to flip it

2/3 x-2<0

You want to add 2 to both sides

2/3 x-2+2<0+2

2/3x<2

You want to divide both sides by 2/3

2/3x < 2

-—— —

2/3 < 2/3

X<6/2

8 0

2 years ago

Devin needs to fill a square pyramid that has a base of 6cm and height of 10cm,he needs to melt cubes that are 2cm by 2cm by 2cm

aleksandrvk [35]

Answer:

Three cubes

Step-by-step explanation:

Lets first write down what we know.

The dimensions of the pyramid are a base of 6cm and a height of 10cm.

The cubes are 2cm by 2cm by 2cm.

We need to find the volume of both to solve.

First, lets solve for the volume of the pyramid. The equation is Volume=base*height/3

Lets put in the values we know.

volume=6*10/3

Multiply.

volume=60/3

Divide.

volume=20cm

Now that we know the volume of the pyramid is 20cm, all we have to do is find the volume of the cubes, and then divide 20cm by their volume.

To find the volume of the cubes, we just need to multiply length, width, and height together.

2cm*2cm*2cm=8cm

Now divide 20cm by 8cm.

20/8=2.5 rounding up to 3.

Devin will need to melt 3 cubes to fill the square pyramid.

Hope this helps!

3 0

3 years ago

There are a total of 15 bicycles and tricycles.There are 37 wheels all together if we count them up. How many tricycles and how

m_a_m_a [10]

Answer: there are eight bicycles and 7 tricycles.

Step-by-step explanation:

Let x represent the number of bicycles that are there.

Let y represent the number of tricycles that are there.

There are a total of 15 bicycles and tricycles. This means that

x + y = 15

A bicycle has 2 wheels and a tricycle has 3 wheels. There are 37 wheels all together if we count them up. This means that

2x + 3y = 37- - - - - - - - - - - - - 1

Substituting x = 15 - y into equation 1, it becomes

2(15 - y) + 3y = 37

30 - 2y + 3y = 37

- 2y + 3y = 37 - 30

y = 7

x = 15 - y = 15 - 7

x = 8

7 0

4 years ago

There are 3 girls for every 2 boy at a party. There are 20 boys at the party.how many girl are there​

There are 3 girls for every 2 boy at a party. There are 20 boys at the party.how many girl are there