3 years ago

If y varies directly as x^2 find k when x=2 and y=8

Mathematics

1 answer:

Grace [21]3 years ago

8 0

I think the answer is 2

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HELP QUICK AND FAST WHAT THE ANSWER

pychu [463]

The answer is C.

V= 3.14 * (7*7) * 14 / 3

6 0

2 years ago

Find the area of a sector with a central angle of 120° and a diameter of 7.3 cm. Round to the nearest tenth.

Andru [333]

Answer: $14cm^{2}$

Step-by-step explanation:

diameter=7.3cm

radius= $\frac{diameter}{2}$

= $\frac{7.3}{2}$

=3.65cm

angle =120°

area= $\frac{angle (tita)}{360}$ × $\frac{\pi r^{2} }{1}$

= $\frac{120}{360}$ × $\frac{22}{7}$ × $3.65^{2}$

= $13.95cm^{2}$

≅ $14cm^{2}$

6 0

2 years ago

Find the product: (x² - x + 1)(2x² + 3x + 2).

Tresset [83]

Answer:

(2x^3-2x^2-12x) is the required product.

Step-by-step explanation:

The given equation is:

2x(x-3)(x+2)

Solving the above given equation, we get

=(2x^2-6x)(x+2)

which can be written as:

=(2x^3-6x^2+4x^2-12x)

Solving the like terms, we get

=(2x^3-2x^2-12x)

which is the required product of the given expression.

3 0

2 years ago

Can anyone help me ?

Eva8 [605]

The answer is right

3 0

2 years ago

Help? I’m stuck anyone ?

ivolga24 [154]

Its B.. Hope that helps :)

7 0

2 years ago

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