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krok68 [10]
1 year ago
14

Determine whether y = -2x² - 3 is a function.

Mathematics
1 answer:
Alexus [3.1K]1 year ago
5 0

Answer:yes

Step-by-step explanation:

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Find the height of a cylinder with radius 13 and surface area 1470.3.
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First you need the formula for SA of a cylinder: SA = 2(πr^2) + 2πr*h
(area of the top and bottom circles plus the side)
Then plug your values into the equation and rearrange to make h the subject:
1470.3 = 2π13^2 + 2π*13*h
26πh = 1470.3 - 338π
h = (1470.3 - 338π)/26π
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3 years ago
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The area of a plot of land is 2496 square meters. A small part of the land is fenced. The ratio of the area of the plot of land
AfilCa [17]
My late response (haha): First, you would write a proportion.

Step 1: 2496 over 48 = x over 31
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Step 3: Calculate
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Step 4: Divide both sides by 48
77376/48 = 1612
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Step 5: Write it as a sentence 
The area of the land that is not fenced is 1612 squared meters. 

Hope that helped! Good luck! :]
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Step-by-step explanation:

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