1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jenyasd209 [6]
3 years ago
9

Sum of n natural numbers is 5n^2 + 4n , find the 8th term​

Mathematics
2 answers:
zalisa [80]3 years ago
5 0

Answer:

The 8th term is 79

Step-by-step explanation:

HOPE THIS HELPS UWU ✨

scZoUnD [109]3 years ago
5 0

Answer:

....

Step-by-step explanation:

You might be interested in
Use cylindrical coordinates. find the volume of the solid that is enclosed by the cone z = x2 + y2 and the sphere x2 + y2 + z2 =
sashaice [31]
Let R be the solid. Then the volume is

\displaystyle\iiint_R\mathrm dV=\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=\sqrt8}\int_{\zeta=r^2}^{\zeta=\sqrt{72-r^2}}r\,\mathrm d\zeta\,\mathrm dr\,\mathrm d\theta

which follows from the facts that

\begin{cases}x=r\cos\theta\\y=r\sin\theta\\z=\zeta\end{cases}\implies\mathrm dx\,\mathrm dy\,\mathrm dz=r\,\mathrm dr\,\mathrm d\theta\,\mathrm d\zeta
(by computing the Jacobian)

and

z=x^2+y^2=r^2\implies z+z^2=72\implies z=-9\text{ or }z=8
(we take the positive solution, since it's clear that R lies above the x-y plane)
r^2+z^2=72\implies z=\pm\sqrt{72-r^2}
(again, taking the positive root for the same reason)
z=r^2\implies 8=r^2\implies r=\sqrt8

\displaystyle\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=\sqrt8}\int_{\zeta=r^2}^{\zeta=\sqrt{72-r^2}}r\,\mathrm d\zeta\,\mathrm dr\,\mathrm d\theta
=\displaystyle2\pi\int_{r=0}^{r=\sqrt8}\int_{\zeta=r^2}^{\zeta=\sqrt{72-r^2}}r\,\mathrm d\zeta\,\mathrm dr
=\displaystyle2\pi\int_{r=0}^{r=\sqrt8}r(\sqrt{72-r^2}-r^2)\,\mathrm dr
=\displaystyle2\pi\int_{r=0}^{r=\sqrt8}(r\sqrt{72-r^2}-r^3)\,\mathrm dr
=\dfrac{32(27\sqrt2-35)\pi}3
7 0
3 years ago
Okay last one of these, 15 points xox​
Vanyuwa [196]

Answer:

<u>13.2 centimeters</u>

Step-by-step explanation:

<u>Finding the missing side</u>

  • (?)² + (9)² = (16)²
  • ?² + 81 = 256
  • ?² = 175
  • ? = √175
  • ? = <u>13.2 centimeters</u>
7 0
1 year ago
Read 2 more answers
PLEASE HELP! all u have to do is determine whether it is positive or negative!!!
Sever21 [200]

Answer:

positive

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Please help, this chapter was on derivatives...
Usimov [2.4K]
<h3>Answer:  ds/dt = 11</h3>

================================================

Work Shown:

Before we can use derivatives, we need to find the value of s when (x,y) = (15,20)

s^2 = x^2+y^2

s^2 = 15^2+20^2

s^2 = 225+400

s^2 = 625

s = sqrt(625)

s = 25

-----------

Now we can apply the derivative to both sides to get the following.  Don't forget to use the chain rule.

s^2 = x^2 + y^2

d/dt[s^2] = d/dt[x^2 + y^2]

d/dt[s^2] = d/dt[x^2] + d/dt[y^2]

2s*ds/dt = 2x*dx/dt + 2y*dy/dt

2(25)*ds/dt = 2(15)*5 + 2(20)*(10)

50*ds/dt = 150 + 400

50*ds/dt = 550

ds/dt = 550/50

ds/dt = 11

-----------

Side note: The information t = 40 is never used. It's just extra info.

8 0
2 years ago
Which of the follwing is correxr
agasfer [191]

Answer:

the equation has infinitely amny solutions

3 0
2 years ago
Other questions:
  • Please help me with this question it’s a test and I need answers!!
    6·2 answers
  • Mira's kitchen sink holds up to 103 468 liters of water. Round this amount to the nearest liter.
    9·1 answer
  • Figure ABCD is a parallelogram.
    15·1 answer
  • I need help with this problem. Find the standard score (z) such that the area above the mean and below z is about 34% of the are
    10·1 answer
  • Find the 98th term of the arithmetic sequence 14, 10, 6, ...
    9·2 answers
  • ANSWER ASAP!!<br> I know this is confusing, but apparently you have to answer a, b, c, and d.
    8·1 answer
  • A cylindrical bucket having inner height and radius 32cm and 8cm respectively, is filled with sand. This bucket is emptied on a
    14·1 answer
  • Whats the slope (1,8) and (4,6)​
    15·1 answer
  • Please Help Me! This Is Due Soon.
    7·1 answer
  • Pls help due tomorrow if correct ill give brailiest
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!