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marusya05 [52]
3 years ago
13

If f(x)=2x^2+1, what is f(x) when x =3 A)1B)7C)13D)19​

Mathematics
1 answer:
vlabodo [156]3 years ago
6 0

option D is right answer

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Find the circumference of the circle. Use 3.14
Alisiya [41]

Answer:

62.8

Step-by-step explanation:

the circumference is equal to the radiusx2xpi

it gives us the diameter but not the radius

to find the radius from the diameter we just divide it by 2 so the radius is 10

then we just do 10x2x3.14 which is 62.8

8 0
3 years ago
Find Dy/dX when x^y×y^x=1​
victus00 [196]

by dy/dx, we'll be assuming that "y" is encapsulating a function, a function in terms of "x".

x^y\cdot y^x=1\implies \stackrel{\textit{\large product rule}}{\stackrel{\textit{chain rule}}{yx^{y-1}(1)}\cdot y^x+x^y\cdot \stackrel{\textit{chain rule}}{xy^{x-1}\cdot \frac{dy}{dx}}}~~ = ~~0 \\\\\\ y^{1+x}x^{y-1}+x^{y+1}y^{x-1}\cdot \cfrac{dy}{dx}=0\implies \cfrac{dy}{dx}=\cfrac{-y^{1+x}x^{y-1}}{x^{y+1}y^{x-1}} \\\\\\ \cfrac{dy}{dx}=-~~ y^{(1+x)-(x-1)}~~x^{(y-1)-(y+1)} \\\\\\ \cfrac{dy}{dx}=-~~ y^2x^{-2}\implies \cfrac{dy}{dx}=\cfrac{-y^2}{x^2}

7 0
2 years ago
87 is 58% of what number
crimeas [40]
87       58%
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x           100%               = 8700/58 = 150.862069  = 150.86
3 0
3 years ago
Read 2 more answers
Brian ate 2/3 of a pizza. His friend, Joseph ate 1/4 of what was left. How much pizza did joseph eat?
pshichka [43]

Answer:

\frac{1}{12}

Step-by-step explanation:

\frac{2}{3} = \frac{8}{12}

\frac{12}{12} - \frac{8}{12} = \frac{4}{12}

\frac{4}{12} * \frac{1}{4} = \frac{4}{48} = \frac{1}{12}

3 0
3 years ago
Simplify the expression by combining like terms<br>4r+3c-2r+9c​
Novay_Z [31]

Answer:

2r+12c

Step-by-step explanation:

5 0
3 years ago
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