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Alenkasestr [34]
3 years ago
5

Absolute value of |9|

Mathematics
1 answer:
oee [108]3 years ago
7 0

Answer:

The absolute value of 9 is... 9.

Step-by-step explanation:

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aalyn [17]

Answer :V=πr2h=π·72·11≈1693.31844

Step-by-step explanation:

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3 years ago
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A new LED light bulb uses 10 watts of power. Since energy = power × time , then the energy used for this light bulb can be found
sergiy2304 [10]

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Answer:

  150 Wh

Step-by-step explanation:

We know the energy per bulb is 10 Wh per hour, so the total energy used by 3 bulbs in 5 hours is ...

  (10 Wh/(bulb·hour))×(3 bulbs)×(5 hours) = 10·3·5 Wh = 150 Wh

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3 years ago
An item that cost $5.50 is marked up %60. What is the new price of the item after the markup? Show work please​
r-ruslan [8.4K]

Answer:

$8.80

Step-by-step explanation:

In order to find the new price, you need to add 60% of the original price (5.50) to the original price. You have two options:

1) multiply $5.50*0.6 to get 60% of the original price. You would get $3.30. Then add $3.30+$5.50, which equals $8.80. This way takes longer but shows you all the steps.

2) The shorter way is to simply multiply $5.50*1.6, which also equals $8.80. This works because the "1" automatically adds the 5.50 to 60% of the original price, this way you don't have to multiply then add.

If you don't understand how the second way works or your teacher taught you #1, just do it the first way.

8 0
3 years ago
4x + y = 3<br>-x + 2y = -3<br>I need to use substitution to solve this. help?​
IrinaK [193]

Answer:

(x,y) (1,-1)

Step-by-step explanation:

y=3-4x

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x+2(3-4x)=-3

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y=3-4*1

y=-1

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3 years ago
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A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed, t
xxMikexx [17]
If we let
x as the distance traveled by the boat
y as the distance between the boat and the lighthouse.

Then, we have:
tan 18°33' = 200 / (x + y)
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Solving for y in the second equation:
y = 200 / tan 51°33'

Rearranging the first equation and substituting y
x = 200 / tan 18°33' - 200 / tan 55°33'
x = 458.81 ft

Therefore, the boat traveled 458.81 ft before it stopped.
5 0
3 years ago
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