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Anvisha [2.4K]
3 years ago
12

The volume of a cone with a height of 6 cm is 8 cubic centimeters. Which expression can be used to find r, the radius of

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
5 0
The base of the cone has to be B-3(n6)
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Help me with this question plz thx!!​
Alborosie

Answer:

9x² - 9y + 9

Step-by-step explanation:

Step 1: Write out expression

3 - 2y - 1 + 5x² - 7y + 7 + 4x²

Step 2: Combine like terms (x²)

9x² + 3 - 2y - 1 - 7y + 7

Step 3: Combine like terms (y)

9x² - 9y + 3 - 1 + 7

Step 4: Combine like terms (constants)

9x² - 9y + 9

8 0
3 years ago
Ellen has a pencil 2x+15cm long. Tom has a pencil5x+25cm long. How much longer is Tom's pencil than Ellen's?
Pachacha [2.7K]

Answer:

3x + 10cm

Step-by-step explanation:

This is calculated as:

Length of Tom's pencil - Length is Ellen's pencil

Length of Tom's pencil: 5x+25cm long.

Length of Ellen's pencil : 2x+15cm long.

(5x + 25)cm - (2x + 15)cm

5x + 25 - 2x - 15

5x - 2x + 25 - 15

3x + 10 cm

Therefore, Tom's pencil is 3x + 10cm longer is than Ellen's.

8 0
3 years ago
Alaska has a land area of about 1,700,000 square kilometers Florida has a land area 1/10 the size of Alaska.what is the land are
Virty [35]
1700000/10 is 170000
So the size of Florida is 170,000 kilometers^{2}
5 0
3 years ago
Chris made hamburgers for his family and they each had a diameter of 3 in. If he made 16 hamburgers.
Alenkasestr [34]

Answer:

The total area for all 16 hamburgers is <u>113.04 in²</u>.

Step-by-step explanation:

Given:

Chris made hamburgers for his family and they each had a diameter of 3 in.

If he made 16 hamburgers.

Now, to find the total area for all 16 hamburgers.

So, the diameter 3 in is given and we need first to find the radius:

Radius\ (r)=\frac{Diameter}{2} =\frac{3}{2} =1.5\ in.

Now, to get the area of a hamburger we put formula:

<u><em>(Taking the value of π = 3.14.)</em></u>

Area=\pi r^2\\\\Area=3.14\times (1.5)^2\\\\Area=3.14\times 2.25\\\\Area=7.065\ in^2.

Now. to get the total area of 16 hamburgers by multiplying 16 by the area of a hamburger:

7.065\times 16\\\\=113.04\ in^2.

Therefore, the total area for all 16 hamburgers is 113.04 in².

7 0
3 years ago
An alloy consists of nickel, zinc, and copper in the ratio 2:7:9. How many pounds of nickel have to be used to create alloy that
Hunter-Best [27]

We are given ratio nickel to zinc to copper = 2:7:9.

From this ratio we can see that <em>ratio of nickel to zinc is 2:7</em>.

Let us assume number of pounds of nickel have to be used to create alloy that contains 4.9 lb of zinc is x pounds.

So, we can setup a proportion as :

x : 4.9 =  2:7

Or

\frac{x}{4.9}=\frac{2}{7}

On cross multiplication, we get

7x= 4.9× 2

7x = 9.8

Dividing both sides by 7, we get

x = 1.4.

<h3>Therefore, 1.4 pounds of nickel have to be used to create alloy that contains 4.9 lb of zinc.</h3><h3 />
6 0
3 years ago
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