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dangina [55]
2 years ago
14

PLZZ HELP?

Mathematics
2 answers:
andreyandreev [35.5K]2 years ago
6 0
The answer is 45 because it has to be multipled etc
pochemuha2 years ago
4 0
I would say 45 is the right answer
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Let x represent the number of pages left to be read in a book consisting of 780 pages.
tamaranim1 [39]

Answer:

E.

Step-by-step explanation:

not sure sorry...anyone help this

8 0
3 years ago
Show that the sum of two concave functions is concave. Is the product of two concave functions also concave?
spayn [35]

Answer with explanation:

Let us assume that the 2 functions are:

1) f(x)

2) g(x)

Now by definition of concave function we have the first derivative of the function should be strictly decreasing thus for the above 2 function we conclude that

\frac{d}{dx}\cdot f(x)

Now the sum of the 2 functions is shown below

y=f(x)+g(x)

Diffrentiating both sides with respect to 'x' we get

\frac{dy}{dx}=\frac{d}{dx}\cdot f(x)+\frac{d}{dx}\cdot g(x)\\\\

Since each term in the right of the above equation is negative thus we conclude that their sum is also negative thus

\frac{dy}{dx}

Thus the sum of the 2 functions is also a concave function.

Part 2)

The product of the 2 functions is shown below

h=f(x)\cdot g(x)

Diffrentiating both sides with respect to 'x' we get

h'=\frac{d}{dx}\cdot (f(x)\cdot g(x))\\\\h'=g(x)f'(x)+f(x)g'(x)

Now we can see the sign of the terms on the right hand side depend on the signs of the function's themselves hence we remain inconclusive about the sign of the product as a whole. Thus the product can be concave or convex.

8 0
3 years ago
What is 60 divided by 1.79
Marizza181 [45]
--->33.5195530726257
3 0
3 years ago
Please help me to do this problem since I don't know how to do it. Please don't answer with links that don't work please this is
Ymorist [56]
Not sure what the photo is, can’t view it
8 0
3 years ago
Read 2 more answers
What is the value of log16 4?
stepan [7]
1 ) log ( 16 ) 4 = 1/2
Answer: B ) 1/2
2 ) 125 ^( 9 x - 2 ) = 150
9 x - 2 = log ( 125 ) 150
9 x - 2 = 1.038
9 x = 1.038 + 2
9 x = 3.038
x = 3.038 : 9
x = 0.3375
Answer: C ) 0.3375
3 ) log ( 3 x + 2 ) = 3
3 x + 2 = 10^3
3 x + 2 = 1000
3 x = 1000 - 2
3 x = 998
x = 998 / 3
Answer: B ) 998 / 3 
6 0
4 years ago
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