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3 years ago

Find the value of this expression if x = -7. x2 - 1

Mathematics

2 answers:

Reika [66]3 years ago

7 0

Answer:

x² - 1

-7² - 1

49 - 1

Free_Kalibri [48]3 years ago

3 0

The answer is: -14 -1 equals -15

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If square root of x has a decimal approximation of 3.4, then x is between which two integers? In your final answer, include all

Zina [86]

Answer:

You know that √x = 3.4, therefore x = 3.4² = 11.56

Hope I helped :)

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2 years ago

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Answer? ............

Ksju [112]

X = 36
because angle 108 = 3x
3 x 36 = 108

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2 years ago

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a cone with a radius of 3” has a total area of 24pie square inches. Find the volume of the cone. 12pie, 24 pie or 15 pie

Ratling [72]

Answer:

$12\pi (inches)^{2}$

Step-by-step explanation:

Given:

radius of cone = 3 inch

Total area of cone = $24\pi (inch)^{2}$

Find the volume of the cone?

We know the area of cone = $\pi r(r+s)$ -------(1)

Where r = radius

Ans s = side of the cone

Put the area value in equation 1

$24\pi=\pi r(r+s)$ -------(1)

$\frac{24\pi }{\pi r} =r+s$

$\frac{24}{ r}-r =s$

Put r value in above equation.

$s =\frac{24}{ 3}-3$

$s=8-3$

$s=5$

The side s = 5 inches

We know the side of the cone formula

$s^{2}=r^{2}+ h^{2}$

$h^{2}=s^{2}- r^{2}$

Put r and s value in above equation.

$h^{2}=5^{2}- 3^{2}$

$r^{2} = 25-9$

$r^{2} = 16$

$r = 4$

The volume of cone is

$V = \frac{1}{3} \pi r^{2} h$

Put r and h value in above equation.

$V = \frac{1}{3} \pi (3)^{2}\times 4$

$V = 12\pi (inches)^{2}$

The Volume of the cone is $12\pi (inches)^{2}$

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2 years ago

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

sveta [45]

I think the answer is B.
Hope this helps.

4 0

3 years ago

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55 divided (4 plus 7) times 6 plus(15 divided by3

Ne4ueva [31]

55/(4+7) x 6+(15/3)= 35

because...

55/(4+7)=5
5 x 6=30
30+(15/3)=35
So in total it equals to 35.

5 0

2 years ago

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