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Aliun [14]
3 years ago
11

Which expression has a value that is equal to the given expression when n = 8?

Mathematics
1 answer:
GREYUIT [131]3 years ago
8 0

Answer:

2n+10 <em>and</em><em> </em>2(n+5)

Step-by-step explanation:

2n + 10 \\ 2(8) + 10 = 26 \\ and \\ 2(n + 5) \\  = 2(8 + 5) \\  = 2(13) = 26 \\ \: hence \\ 2n + 10 = 2(n + 5) = 26

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If you know how to solve this, Please answer it. Thank You
stira [4]

Answer:                                                                                                                                                      

2                                                                                                                                                       Step-by-step explanation:

in the places there is X you put -3 , -3 squared minus 7 is equal to 9 , 9-7 is equal to 2

3 0
3 years ago
Read 2 more answers
Please help me!!!! Help me find the dimensions. :(
Gnom [1K]
The volume, surface area and the ratios of the SA to volume will be as follows:
Volume=πr²h
Area=2πr²+πdh
Ratio of SA to volume=Area/volume
π=3.14
Thus using the above formula:

1.
a]
Radius: 3 inches
Height: 2 inches
Volume=πr²h
volume=π×3²×2=56.52 in³

b]
Area=2πr²+πdh
2×π×3²+π×2×3×2
=56.55+37.68
=94.23 in²

c]
Ratio=area/volume
=94.23/56.52
=1.6672


1. 
Radius: 2 inches
Height: 9 inches

a]
V=πr²h
V=3.14*2^2*9
V=113.04 in³

b] 
Area=2πr²+πdh
=2*3.14*2^2+3.14*2*2*9
=25.12+113.04
=138.16 in²

c]
Ratio=area/volume
=138.16/113.04
=11/9

3.
Diameter=4 inches
Height= 9 inches

a]
V=πr²h
V=3.14×2²×9
V=113.04

b]
Area=2πr²+πdh
=2*3.14*2^2+3.14*4*9
=25.12+113.04
=138.16 in²

c]
Ratio=area/volume
=138.16/113.04
=11/9

4]
Diameter: 6 inches
Height: 4 inches

a]
Volume=πr²h
=3.14×3²×4
=113.04 in³

b]
Area=2πr²+πdh
=2×3.14×3²+3.14×6×4
=56.52+75.36
=131.88 in²

c] Ratio
131.88/113.04
=7/6

1. For the surface area to volume to be small it means that the area is smaller than the volume, for surface area to volume  be larger it means that the surface area is larger than the volume. It is more economical for the surface area to volume to be small because it will mean that small amount of materials make cans with large volume. This means cost of production is cheaper.

2. To evaluate this process let's use one of the dimensions:
Radius: 3 inches
Height: 2 inches:

i. add radius and height:
3+2=5 inches
ii. Multiply radius and height:
3×2=6
iii. Dividing the result from step 1 by the result in step 2:
5/6

iv. Multiply the result from step 3 by 2:
5/6×6
=5
This result does not seem to add up to the result in our earlier ratio. Thus we conclude that Khianna was wrong. This method can't work with 3-D figures.


7 0
4 years ago
In a company, 90% of the workers are men! If 340 people work for the company who aren’t men, how many workers are in all?
Oxana [17]

Answer:

340/(1-90%)= 3400

Step-by-step explanation:

3 0
3 years ago
Priya has planted a garden shaped like a right triangle. She knows that one leg of the triangle is 11 meters long and that the a
olga55 [171]

Answer:

She will need 41.22 meters.

Step-by-step explanation:

She knows that one leg of the triangle is 11 meters long and that the angle formed by that leg and the hypotenuse is 50 degrees .

The leg is adjacent to the hypothenuse. We know that the cosine of an angle \theta is given by:

\cos{\theta} = \frac{l}{h}

In which l is the length of the adjacent side and h is the hypothenuse.

Considering that we have \theta = 50, l = 11, we can find the hypothenuse.

Looking at a calculator, the cosine of 50 degrees is 0.6428.

So

0.6428 = \frac{11}{h}

0.6428h = 11

h = \frac{11}{0.6428}

h = 17.11

The other leg:

In a right triangle, with legs l_1 and l_2, and hypothenuse h, the pythagorean theorem states that:

l_1^2 + l_2^2 = h^2

We already have one of the legs and the hypothenuse, so:

11^2 + l^2 = 17.11^2

l^2 = 17.11^2 - 11^2

l = \sqrt{17.11^2 - 11^2}

l = 13.11

How many meters will she need?

This is the perimeter of the garden, which is the sum of its dimensions, of 11 meters, 13.11 meters and 17.11 meters. So

P = 11 + 13.11 + 17.11 = 41.22

She will need 41.22 meters.

4 0
3 years ago
Neil wants to buy some video games over the Internet. Each game costs $25.01 and has a shipping cost of $9.98 per order. If Neil
ozzi
The answer to the question is <span> 9.98 + 25.01p ≤ 60</span>
5 0
4 years ago
Read 2 more answers
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