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3 years ago

A certain shade of pink is created by adding 3 cups of red paint to 7 cups of white paint.

Mathematics

2 answers:

elixir [45]3 years ago

7 0

I’m pretty sure the answer is 0.4

Debora [2.8K]3 years ago

4 0

Answer: The answer is 0.429 (0.43 or 0.4)

Step-by-step explanation: When you do 7/3, you get 2.33. So, you take 1 for the 1 cup of red paint and divide it from 2.33 (constant of proportionality) and you get 0.4!

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9. What is the tan(90-x)?

Aleonysh [2.5K]

$\\ \sf\longmapsto tanx=\dfrac{Perpendicular}{Base}$

$\\ \sf\longmapsto tanx=\dfrac{4}{3}$

$\\ \sf\longmapsto x=tan^{-1}(4/3)$

$\\ \sf\longmapsto x=53°$

$\\ \sf\longmapsto tan(90-x)$

$\\ \sf\longmapsto cotx$

$\\ \sf\longmapsto cot53$

$\\ \sf\longmapsto \dfrac{3}{4}$

$\\ \sf\longmapsto 0.75$

6 0

2 years ago

Read 2 more answers

Write the standard form of the equation of the parabola with the given focus or directrix and

horsena [70]

Answer:

x = 1/20 y^2

Step-by-step explanation:

This is a rightward opening (sideways ) parabola

Directrix = x = -5

Distance formula form point x,y to directrix and focus are equal:

(x - -5)^2 = (x-5)^2 + y^2

x^2 + 10x + 25 = x^2 - 10x + 25 + y^2

20x = y^2

x = 1/20 y^2

3 0

2 years ago

The seventh grade wants to break last year's record of 78 coats collected for the annual clothing drive. They have already colle

e-lub [12.9K]

Answer:

78=c-13

c=65

____________________

13 65 78

3 0

3 years ago

In a theatre seats are arranged in rows. A teacher took her team of 50 students to the theatre for a field trip.there are 6 rows

lord [1]

48*465=8462*585655*446=745

7 0

3 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

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

4 0

4 years ago