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Likurg_2 [28]
3 years ago
13

Maximize Q=3xy^2, where x and y are positive numbers such that x+y^2=2

Mathematics
1 answer:
Ivanshal [37]3 years ago
6 0
Sub x = 2-y^2 to Q, we get:
Q = 3(2-y^2)*y^2
let y^2 = k
Q = 3(2-k)k = 3(2k-k^2)
2k-k^2 has a max when k = 1
Then y^2 = 1 -> y = 1 or -1
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A reflecting telescope contains a mirror shaped like a parabola of revolution. If the mirror is 16 inches across at its opening
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Step-by-step explanation:

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3 years ago
Which if the following is the equation of a line that passes through the points (2,5) and (4,3)
Taya2010 [7]
Hi there!

First, let's find the slope of the two points using the slope formula (y2 - y1 / x2 - x1).

S = 4 - 2 / 3 - 5
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S = -1

Next, we'll plug in the slope and a point into point-slope form (y - y1 = s(x - x1)) in order to find an equation. I will show the work using both points, which will result in two different equations.

(2,5)
y - 5 = -1(x - 2)
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(4,3)
y - 3 = -1(x - 4)
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The two equations came out the same! Which is completely okay, and happens sometimes. 

Hope this helps!! :)
If there's anything else that you're needing help with, don't be afraid to reach out!


3 0
3 years ago
Which expression represents the difference between 2n and 15
ValentinkaMS [17]
Is these the choices to chose from:
<span>A) 2n-15
B) 15-2n
C) Both A and B
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4 0
3 years ago
What is the value of x when f(x)=7? the function or whatever is f (x) =x^3 - 1
pashok25 [27]

Answer:

f ( 7 ) = 342  

Step-by-step explanation:

Step 1:

f ( x ) = x³  - 1          Function

Step 2:

f ( 7 ) = 7³ - 1        Input x value

Step 3:

f ( 7 ) = 343 - 1        Exponents

Answer:

f ( 7 ) = 342          Subtract

Hope This Helps :)

4 0
3 years ago
Read 2 more answers
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kow [346]

Answer:

the one on the right y=4x

Step-by-step explanation:

even if u switch out x it will yeah

5 0
2 years ago
Read 2 more answers
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