3 years ago

PLZ HELP ill GIVE BRAINIESt!!!!20 Points

Mathematics

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Semmy [17]3 years ago

4 0

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Sarah and Bryan went shopping and spend a total of $47.50. Bryan spends $15.50 less than was Sarah spent. How much did Bryan spe

myrzilka [38]

X+(x+15.50)=47.50
2x=32
x=16
Bryan spends $16

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3 years ago

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The expression 9/5C + 32, where C stands for the temperature in degrees Celsius, is used to convert Celsius to Fahrenheit. If th

Ira Lisetskai [31]

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3 years ago

6 Which expression below has a coefficient of 3?

deff fn [24]

Answer: C.

Step-by-step explanation:

C. is the only one with a 3 right next to the x. In 3x, 3 would be the coefficient)

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2 years ago

Use spherical coordinates. evaluate (9 − x2 − y2) dv, where h is the solid hemisphere x2 + y2 + z2 ≤ 4, z ≥ 0.

avanturin [10]

In spherical coordinates, we have

$\begin{cases}x=\rho\cos\theta\sin\varphi\\y=\rho\sin\theta\sin\varphi\\z=\rho\cos\varphi\end{cases}$

which gives volume element

$\mathrm dV=\mathrm dx\,\mathrm dy\,\mathrm dz=\rho^2\sin\varphi\,\mathrm d\rho\,\mathrm d\varphi\,\mathrm d\theta$

and so the triple integral is given by

$\displaystyle\iiint_H(9-x^2-y^2)\,\mathrm dV$
$=\displaystyle\int_{\theta=0}^{\theta=2\pi}\int_{\varphi=0}^{\varphi=\pi/2}\int_{\rho=0}^{\rho=2}(9-\rho^2\sin^2\varphi)\rho^2\sin\varphi\,\mathrm d\rho\,\mathrm d\varphi\,\mathrm d\theta$
$=\displaystyle2\pi\int_{\varphi=0}^{\varphi=\pi/2}\int_{\rho=0}^{\rho=2}(9\rho^2\sin\varphi-\rho^4\sin^3\varphi)\,\mathrm d\rho\,\mathrm d\varphi$
$=\dfrac{592\pi}{15}$

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3 years ago

2. Solve: 33 + 2(5+8)-(6-2)

mars1129 [50]

Answer:

Step-by-step explanation:

Add the numbers 5 + 8 and you get 13. Multiply 13 x 2 which is 26. Add 33 + 26 and you get 59. Then, subtract it by 4 and you get 55.

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2 years ago