All categories

3 years ago

Evaluate the expression when c=3 and y=-4. 8c-y

Mathematics

1 answer:

Savatey [412]3 years ago

3 0

Answer:

Step-by-step explanation:

8c - y

8( 3) - (- 4)

24 + 4

You might be interested in

Find the area of the surface. the part of the hyperbolic paraboloid z = y2 − x2 that lies between the cylinders x2 + y2 = 4 and

Nadusha1986 [10]

Call the surface $S$ ; then the area of $S$ is given by the surface integral

$\displaystyle\iint_S\mathrm d\mathbf S$

Parameterize the surface by

$\mathbf r(u,v)=\begin{cases}x(u,v)=u\cos v\\y(u,v)=u\sin v\\z(u,v)=u^2\cos^2v-u^2\sin^2v=u^2\cos2v\end{cases}$

with $2\le u\le4$ and $0\le v\le2\pi$ . The surface element is given by

$\mathrm d\mathbf S=\|\mathbf r_u\times\mathbf r_v\|\,\mathrm du\,\mathrm dv$
$\mathrm d\mathbf S=u\sqrt{1+4u^2}\,\mathrm du\,\mathrm dv$

So the area is

$\displaystyle\iint_S\mathrm d\mathbf S=\int_{v=0}^{v=2\pi}\int_{u=2}^{u=4}u\sqrt{1+4u^2}\,\mathrm du\,\mathrm dv$
$=\displaystyle2\pi\int_{w=17}^{w=65}\sqrt w\,\frac{\mathrm dw}8$

where $w=1+4u^2\implies\mathrm dw=8u\,\mathrm du$

$=\displaystyle\frac\pi4\frac23w^{3/2}\bigg|_{w=17}^{w=65}$
$=\dfrac\pi6\left(65^{3/2}-17^{3/2}\right)\approx237.69$

8 0

3 years ago

Solve the equation.

Gelneren [198K]

Answer:

x=-5/4 or x=9/4

Step-by-step explanation:

2 - 4x = -7

-4x = -7 - 2

-4x = -9

x = 9/4

2 - 4x = 7

-4x = 7-2

-4x = 5

x = -5/4

5 0

2 years ago

33.32 divided by 9.8

kifflom [539]

Answer:

33.32 / 9.8 = 3.4;

Step-by-step explanation:

3 0

3 years ago

Which is bigger 1/12 or 12%?

Archy [21]

12% would be bigger because it is a whole number other then the fraction.

7 0

3 years ago

Read 2 more answers

What is the cube root of -216 end root

givi [52]

The cube root of -216 is -6.0

7 0

3 years ago

Read 2 more answers