3 years ago

The volume of a cone with radius r and height h is given by the formula V =

Mathematics

1 answer:

Natasha_Volkova [10]3 years ago

6 0

Answer:

7536 ft^3

Step-by-step explanation:

Volume of a cone is 1/3(h*pi*r^2) First find radius, diameter/2, so the radius is 20 ft. Now plug in to find answer.

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A student was given the equation x^2+2x-16=0 to solve by completing the square. The first step that was written is shown below.

AlexFokin [52]

Answer:

$x_{1}=-1+\sqrt{17},\:x_{2}=-1-\sqrt{17}$

Step-by-step explanation:

Quadratic Equation Given:

$x^2+2x-16=0$

$x^2 + 2x=16$

$c=\left( \frac{b}{2} \right)^2$

$x^2 + 2x+1=16+1$

$(x+1)^2=17\\$

$x+1=\pm \sqrt{17} \\$

$x=-1 \pm \sqrt{17} \\$

$x_{1}=-1+\sqrt{17},\:x_{2}=-1-\sqrt{17}$

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3 years ago

What is the first step is 12 devided by 4 x 3 + 2 x 1

SVEN [57.7K]

Answer:

Step-by-step explanation:

PENDAS? divide 12 by 4 first

5 0

2 years ago

What are the solutions of this equation 16-2x^2=-64

xenn [34]

Answer:

x = ± 2 $\sqrt{10}$

Step-by-step explanation:

Given

16 - 2x² = - 64 ( subtract 16 from both sides )

- 2x² = - 80 ( divide both sides by - 2 )

x² = 40 ( take the square root of both sides )

x = ± $\sqrt{40}$ = ± $\sqrt{4(10)}$ = ± 2 $\sqrt{10}$

5 0

3 years ago

Solve for x.<br>-4x - 76 < -52<br>

Roman55 [17]

First you add 76 to get

-4x<24

And Then you divide by -4 and sincr its a negative you flip the sign to get

x>-6

That might be wrong Idk

4 0

2 years ago

Can someone plz help me

Nata [24]

Answer:

A = 65, B = 75

Step-by-step explanation:

x + x + 10 + 40 = 180

2x + 50 = 180

2x= 130

x = 65

3 0

2 years ago

Read 2 more answers