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3 years ago

Add the two expressions. 2n−3 and −7n+2

2 answers:

8 0

Well, we're not trying to find n, necessarily, simply add the two expressions, right? So let's get the like terms together:

(2n - 7n) + (-3 + 2)

And then add to get -5n - 1

Sedaia [141]3 years ago

4 0

I think -5n-1 but i may be wrong

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The volume of a cone of radius r and height h is given by V=πr²h³. If the radius and the height both increase at a constant rate

Aloiza [94]

Answer:

The volume of cone is increasing at a rate 1808.64 cubic cm per second.

Step-by-step explanation:

We are given the following in the question:

$\dfrac{dr}{dt} = 12\text{ cm per sec}\\\\\dfrac{dh}{dt} = 12\text{ cm per sec}$

Volume of cone =

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

where r is the radius and h is the height of the cone.

Instant height = 9 cm

Instant radius = 6 cm

Rate of change of volume =

$\dfrac{dV}{dt} = \dfrac{d}{dt}(\dfrac{1}{3}\pi r^2 h)\\\\\dfrac{dV}{dt} = \dfrac{\pi}{3}(2r\dfrac{dr}{dt}h + r^2\dfrac{dh}{dt})$

Putting values, we get,

$\dfrac{dV}{dt} = \dfrac{\pi}{3}(2(6)(12)(9) + (6)^2(12))\\\\\dfrac{dV}{dt} =1808.64\text{ cubic cm per second}$

Thus, the volume of cone is increasing at a rate 1808.64 cubic cm per second.

5 0

3 years ago

Law of Sines or Law of Cosines....Help!!

iren2701 [21]

Answer:

Law of cosines to find missing measures

c^2= a^2+ b^2 - 2ab*cos(C)

Used because it is a SAS triangle

Step-by-step explanation:

This is known as a side, angle, side, or SAS triangle. We can find the missing measures by using the Law of cosines

c^2= a^2+b^2-2ab*cos(C)

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3 years ago

Find the area of the figure. Round to the nearest hundredth if necessary

ki77a [65]

The area of the figure :)

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3 years ago

Read 2 more answers

What is the answer please

Likurg_2 [28]

Answer:

rhombus = a quadrilateral with four congruent sides

rectangle = a quadrilateral with four right angles

parallelogram = a quadrilateral with two pairs of parallel sides

trapezoid = a quadrilateral with one set of parallel sides

square = a quadrilateral with four right angles and four congruent sides

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3 years ago

Math question down below

julsineya [31]

This data set has no outliers, because all of the numbers are close together.

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3 years ago