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
Komok [63]
3 years ago
6

Is this 1/3 7/21 a proportion

Mathematics
2 answers:
Brut [27]3 years ago
3 0
Yes they are proportionate
Yanka [14]3 years ago
3 0

Answer:

Yes it is !

Step-by-step explanation:

You might be interested in
Zadanie optymalizacyjne z matematyki. Proszę o rozwiązanie i wyjaśnienie
Yakvenalex [24]

Volume of the pyramid:

V=\dfrac{s^2h}3

Perimeter of the cross-section:

40=\sqrt2\,s+2\sqrt{\dfrac{s^2}2+h^2}=\sqrt2\left(s+\sqrt{s^2+2h^2}\right)

\implies h=\sqrt{\dfrac{(20\sqrt2-s)^2-s^2}2}=\sqrt{400-20\sqrt2\,s}

Area of the cross-section:

P=\dfrac12(\sqrt2\,s)h=\dfrac{sh}{\sqrt2}

\implies P=\dfrac{s\sqrt{400-20\sqrt2\,s}}{\sqrt2}=s\sqrt{200-10\sqrt2\,s}

First derivative test:

\dfrac{\mathrm dP}{\mathrm ds}=\dfrac{20\sqrt2-3s}{\sqrt{4-\dfrac{\sqrt2}5s}}=0\implies s=\dfrac{20\sqrt2}3

Then the height of the cross-section/pyramid is

h=\sqrt{400-20\sqrt2\,s}=\dfrac{20}{\sqrt3}

The volume of the pyramid that maximizes the cross-sectional area P is

V=\dfrac{\left(\frac{20\sqrt2}3\right)^2\frac{20}{\sqrt3}}3=\dfrac{16000}{27\sqrt3}

5 0
3 years ago
PLEASE HELP END OF 1/4 TODAY!!!!!!!!!
Bad White [126]

Answer:

22

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The proper measuring distance in the U.S. system
mestny [16]
The answer would be <span> inch, foot, yard, and mile</span>.
6 0
3 years ago
Explain why each statement is true. 5 + 2 + 3 = 5 + (2 + 3)
Y_Kistochka [10]

Answer:

Associative property of addition. Grouping different addends does not change the sum.

Step-by-step explanation:

5 + 2 + 3 = 5 + (2 + 3)

10 = 5 + (5)

10 = 10

3 0
3 years ago
Aidan drops a rock from a cliff after 4.0s, the rock is moving at 39.2m/s what is the acceleration of the rock
Cerrena [4.2K]

Here,

time=4.0s

velocity=39.2m/s

Formula:

a=v/t

=39.2/4.0

=9.8 (ms-2)

3 0
3 years ago
Other questions:
  • There are 18 children at a sleepover party. Eleven of the children have blankets, and the other 7 children have stuffed animals.
    8·2 answers
  • Use an integer to represent an earning of 17​
    11·1 answer
  • Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approxi
    10·2 answers
  • The foreman in the welding department wanted to know what value of allowance to use for a particular section of the shop. A work
    13·1 answer
  • Enter the data to create a histogram. Then check all that apply.
    11·2 answers
  • Sequence of transformation
    5·2 answers
  • Simplify square root at end. pythagoreoms theorm
    13·2 answers
  • If tan 0 = 8/15, what is sin 0?
    6·1 answer
  • The dimensions of a
    8·1 answer
  • Plz help!! I will give most brainliest!! No links plz!!!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!