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ArbitrLikvidat [17]

3 years ago

11

Determine whether a triangle can be formed with the given side lengths. If so, use Heron's formula to find the area of the trian

gle. (1 point) a = 240 b = 127 c = 281

1 answer:

Elena-2011 [213]3 years ago

5 0

The answer is 15,183.77 feet.

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4) The diameter of a circle is 32m. The radius is represented by 4(x + 2).

vaieri [72.5K]

Answer:

The value of x is 2

Step-by-step explanation:

Diameter = 2r -------------------------------------------------------------------(1)

where r is the radius

The value of the diameter = 32 m and radius is given to be 4(x+2)

substitute the above into equation (1) and then solve for x

32 = 2 [ 4(x + 2)]

first open the inner bracket

32 = 2[4x + 8}

then open the outer bracket

32 = 8x + 16

subtract 16 from both-side of the equation

32 - 16 = 8x +16 - 16

16 = 8x

Divide both-side of the equation by 8

16/8 = 8x/8

2 = x

x = 2

Therefore, the value of x is 2

3 0

3 years ago

12c : 48c simplest form

Yuliya22 [10]

Answer:

1 : 4

Step-by-step explanation:

12c : 48c ( divide both parts by 12c )

= 1 : 4

5 0

3 years ago

Which equation is the inverse of y = 9x2 - 4?

m_a_m_a [10]

Answer:

The inverse will be:

$y' = \frac{\sqrt{x+4}}{3}$

Step-by-step explanation:

In order to find the inverse of the equation, we do a variable change, since we are finding the inverse, :

$f(x) = 9x^{2} - 4$

$y = 9x^{2} - 4$

$x = 9y' ^{2} - 4$

Now solve for y'.

First add 4 in both sides of the equation and change to the left y'.

$x + 4= 9y'^{2} - 4+4$

$9y'^{2}$ = x + 4

Second divide by 9

$9y'^{2}$ /9 = (x + 4)/9

$y'^{2}$ = (x + 4)/9

Now you will have to clear y, with the square root.

$[tex]y'^{\frac{2}{2}} = \sqrt{x + 4} / \sqrt{9}$ [/tex] =

Simplifying terms

$y' = \frac{\sqrt{x+4}}{3}$

$f^{-1}(x) = \frac{\sqrt{x+4}}{3}$

You can check the answer by doing the evaluation of the following equation:

(f o $f^{-1}$ ) (x)

substitute the equation for y' or inverse function $f^{-1}$

f( $\frac{\sqrt{x+4} }{3}$ )

Now substitue the value into f(x)

You will have

$= 9(\frac{\sqrt{x+4} }{3}} )^{2} - 4\\\\Solving\\\\9(\frac{{x+4} }{9}} ) - 4$

=x

5 0

3 years ago

What is the value of x

mihalych1998 [28]

Answer:

Step-by-step explanation:

x+15+x+115+90=380 degree(sum of interior angles of four angles is 360 degree)

2x+220=360

2x=360-220

x=140/2

x=70 degree

7 0

3 years ago

Help need answer fast

Kazeer [188]

Answer:

A hope this helps

Step-by-step explanation:

hopes this helps bye

6 0

3 years ago