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2 years ago

Am trying to find the value of r 1/r + 2/1-r = 4/r^2

1 answer:

6 0

1/r + 2/1-r = 4/r^2

1-r+2r/r(1-r)=4/r^2
(1+r)/r(1-r)=4/r^2 cancle r both side

1+r/1-r=4/r

cross multiply
r+r^2=4-4r
r^2+4r+r-4=0
r^2+5r-4=0
r^2+4r+r-4=0
solve it for r factor it...

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I’m confused on this one

Mashutka [201]

Greetings!

The formula for the area of any triangle is as followed:

$A_{triangle}=\frac{bh}{2}$

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Let Statements:

Let the variable...

→ $b$ represent the length of the base of the triangle

→ $h$ represent the length of the height of the triangle

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Using the information provided from the question, we can substitute its values in place of the variables and solve for the last remaining variable:

$10=\frac{(4)(x+3)}{2}$

Distribute the parenthesis (The Distributive Property) :

$10=\frac{((4)(x)+(4)(3))}{2}$

$10=\frac{4x+12}{2}$

Reduce the fraction to lowest terms:

$10=2x+6$

Add -6 to both sides of the equation:

$(10)+(-6)=(2x+6)+(-6)$

$4=2x$

Divide both sides of the equation by 2:

$\frac{4}{2}=\frac{2x}{2}$

$2=x$

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The Answer to this Problem is:

$\boxed{x=2}$

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I hope this helped!

-Benjamin

5 0

2 years ago

What is hte vertex of f(x) = 5x^+20x-16

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3 years ago

PLEASE HELP ASAP! Classify the polynomial, 8m^3–10m^2– 7, by degree and number of terms.

Lana71 [14]

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Step-by-step explanation:

The answer is m • (2m - 3) • (4m + 1)

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3 years ago

Write both inequalities graphed above?

Romashka [77]

Answer:

among us

Step-by-step explanation:

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2 years ago

The equation of a circle C, with centre O, is:

Nataliya [291]

Answer:

a) The center coordinates O is (0,0)

b) The radius C = 15

Step-by-step explanation:

The given equation of the circle is : $x^{2} + y^{2} = 225$

Now, general form of the equation of the circle is:

$(x-h)^{2} + (y - k)^{2} = r^{2}$

where (h,k) are the center co -ordinates and r is the radius of the circle.

Comparing the general equation with the given equation, we get

$(x-0)^{2} + (y - 0)^{2} = (15)^{2}$

So, here the center coordinates (h,k) = (0,0)

And the radius of the given circle is r = 15

8 0

3 years ago