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Novosadov [1.4K]
3 years ago
8

Help me with this please!!!!

Mathematics
2 answers:
sveticcg [70]3 years ago
6 0

Answer:

option c is the correct answer

sammy [17]3 years ago
4 0
The answer is C!!! Hope this helps ❤️
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Calculate the speed for a car that went a distance of 125<br> kilometers in 2 hours time.
IrinaVladis [17]

125÷2=67.5

67.5+67.5=125

4 0
2 years ago
Slope is -2/3, and (-6,-5) is on the line
UNO [17]

Answer:

You can use the point intercept equation that uses the slope and a coordinate pair to get the equation

Step-by-step explanation:

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8 0
3 years ago
Multiply.<br> (2x2 – 3x + 1)(x2 - 4x – 3)
Arisa [49]

Answer:

2x^4−11x^3+7x^2+5x−3

Step-by-step explanation:

The  ^  means exponent

3 0
3 years ago
A ball of radius 15 has a round hole of radius 5 drilled through its center. Find the volume of the resulting solid. Hint: The u
OverLord2011 [107]

Answer:

The volume of the ball with the drilled hole is:

\displaystyle\frac{8000\pi\sqrt{2}}{3}

Step-by-step explanation:

See attached a sketch of the region that is revolved about the y-axis to produce the upper half of the ball. Notice the function y is the equation of a circle centered at the origin with radius 15:

x^2+y^2=15^2\to y=\sqrt{225-x^2}

Then we set the integral for the volume by using shell method:

\displaystyle\int_5^{15}2\pi x\sqrt{225-x^2}dx

That can be solved by substitution:

u=225-x^2\to du=-2xdx

The limits of integration also change:

For x=5: u=225-5^2=200

For x=15: u=225-15^2=0

So the integral becomes:

\displaystyle -\int_{200}^{0}\pi \sqrt{u}du

If we flip the limits we also get rid of the minus in front, and writing the root as an exponent we get:

\displaystyle \int_{0}^{200}\pi u^{1/2}du

Then applying the basic rule we get:

\displaystyle\frac{2\pi}{3}u^{3/2}\Bigg|_0^{200}=\frac{2\pi(200\sqrt{200})}{3}=\frac{400\pi(10)\sqrt{2}}{3}=\frac{4000\pi\sqrt{2}}{3}

Since that is just half of the solid, we multiply by 2 to get the complete volume:

\displaystyle\frac{2\cdot4000\pi\sqrt{2}}{3}

=\displaystyle\frac{8000\pi\sqrt{2}}{3}

5 0
3 years ago
Simplify -3y(y + 2)^2 - 5 + 6y
ser-zykov [4K]

Answer:

That'll help a lot of people in the future ^.^

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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