2 years ago

Evaluate (3−1)³+7(6)−5²

Mathematics

2 answers:

Alekssandra [29.7K]2 years ago

7 0

Answer:

The answer is 25.

Step-by-step explanation:

likoan [24]2 years ago

3 0

Answer:

Step-by-step explanation:

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lesya [120]

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3 years ago

Consider the line segment AB with endpoints A(7, 4) and B(2, 5). Which statements are correct?

Kazeer [188]

Answer:

B and C! I just got it right:)

Step-by-step explanation:

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2 years ago

Integrate G(x,y,z)equalsz over the parabolic cylinder yequalszsquared, 0less than or equalsxless than or equals2, 0less than

yKpoI14uk [10]

I gather you're supposed to compute the integral of $G(x,y,z)=z$ over a surface $S$ that is the part of the parabolic cylinder $y=z^2$ with $0\le x\le2$ and $0\le z\le\frac{\sqrt{15}}2$ .

We can parameterize $S$ by

$\vec s(x,z)=x\,\vec\imath+z^2\,\vec\jmath+z\,\vec k$

with the given constraints on $x$ and $z$ . Take the normal vector to $S$ to be

$\vec s_x\times\vec s_z=-\vec\jmath+2z\,\vec k$

so that the surface element is

$\mathrm dS=\|\vec s_x\times\vec s_z\|\,\mathrm dx\,\mathrm dz=\sqrt{1+4z^2}\,\mathrm dx\,\mathrm dz$

Then in the integral, we have

$\displaystyle\iint_Sz\,\mathrm dS=\int_0^2\int_0^{\sqrt{15}/2}z\sqrt{1+4z^2}\,\mathrm dz\,\mathrm dx=\boxed{\frac{21}2}$

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3 years ago

Find the area of the circle. Round to the nearest tenth.

Viktor [21]

Answer:

28.27

Step-by-step explanation:

Area= pi x radius squared

Radius is 1/2 the diameter which in this case is 6 ft

So, pi x 3 squared (9)

= 28.27

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3 years ago

Read 2 more answers

Mike traveled to Greensboro by car. Going there took 6 hours, and the return trip was four hours. Mike averaged a speed of 81 mi

Marat540 [252]

Answer: 64.8 mph

Step-by-step explanation:

Given

Arriving time is 6 hours

return time is 4 hours

The average speed of returning 81 mph

Distance traveled while returning

$\Rightarrow d=81\times 4=324\ miles$

the average speed of the entire trip is

$\Rightarrow v_{avg}=\dfrac{2\times 324}{6+4}=\dfrac{648}{10}=64.8\ mph$

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2 years ago