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3 years ago

What is 20/40 as a decimal

Mathematics

1 answer:

OverLord2011 [107]3 years ago

4 0

20/40 = 1/2 or 0.5 as a decimal

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What is the value of (-7 + 31) – (2 - 6/)?

makkiz [27]

Answer:

Step-by-step explanation:

8 0

3 years ago

A bag contains a number of marbles of which 35 are blue, 10 are red and the rest are

photoshop1234 [79]

Answer:

Y = 45*p(y) / (1 - p(y)) if I knew what p(y) is, we can find how many yellow marbles there are. p(y) = probability of choosing yellow.

Step-by-step explanation:

Total marbles = 35 + 10 + yellow

If probability of choosing yellow =p(y) = yellow/Total

p(y) = Y/(35 + 10 + Y)

Solve for Y,

p(y)*(35 + 10 + Y) = Y

45*p(y) + p(y)*Y = Y

45*p(y) = Y - p(y)*Y

Y = 45*p(y) / (1 - p(y))

7 0

3 years ago

Find the equation of the tangent line to the curve 2exy=x+y at (0,2).

DiKsa [7]

Answer:

The equation of the tangent line to the curve

3 x - y = 2

Step-by-step explanation:

Step(i):-

Given function = f(x,y) = $2e^{xy} -x-y=0$ ...(i)

Differentiating equation (i) with respective to 'x' , we get

$2 e^{xy} \frac{d}{d x} (x y) -1 -\frac{dy}{dx} =0$

apply formula

$\frac{d}{dx} (UV) = UV^{l} +V U^{l}$

step(ii):-

⇒ $2 e^{xy} (x(\frac{d}{d x} ( y))+y(1)) -1 -\frac{dy}{dx} =0$

⇒ $2 e^{xy} (x(\frac{d}{d x} ( y))+ 2e^{xy} y(1)) -1 -\frac{dy}{dx} =0$

Taking common d y/d x

$(2 e^{xy} (x) -1)\frac{dy}{dx} =1- 2e^{x y} y(1))$

$\frac{dy}{dx} =\frac{1- 2e^{x y} y(1))}{(2 e^{xy} (x) -1)}$

put At (0,2)

$\frac{dy}{dx} =\frac{1- 2e^{0} 2(1))}{(2 e^{0} (0) -1)}=\frac{1-4}{-1} =3$

slope of the curve m = 3

Step(iii):-

The equation of the tangent line to the curve

$y-y_{1} =m(x-x_{1} )$

y - 2 = 3 ( x - 0 )

3 x - y = 2

Final answer:-

The equation of the tangent line to the curve

3 x - y = 2

8 0

3 years ago

Which of these fractions are greater than 11/20 A - 3/4 B - 3/10 C - 4/5 D - 1/2

Neko [114]

Answer:

3/4 and 4/5

Step-by-step explanation:

Convert into decimals:

11/20 = 0.55

3/4 = 0.75

3/10 = 0.3

4/5 = 0.8

1/2 = 0.5

075 and 0.8 are greater than 0.55, so 3/4 & 4/5

5 0

3 years ago

Slope is 6 the points are (5,-3)

spin [16.1K]

The anser is 2 hope this helps

3 0

3 years ago