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professor190 [17]
3 years ago
12

Which equation(s) represent joint variations?

Mathematics
2 answers:
Helen [10]3 years ago
8 0

Answer- It's the last two, D & E

Step-by-step explanation:

ale4655 [162]3 years ago
4 0

Answer:

d and e

Step-by-step explanation:

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How is the "subtraction method" used to derive the formula for volume of a cylinder?
NikAS [45]

Answer:

The subtraction method is used to find the volume of the cylinder by recalling that the volume of the cylinder consist of the volume of the cone and the volume of the sphere.

Step-by-step explanation:

In the subtraction method, we have that a cylinder of radius r, equal to that of a circle, and height 2·r consist of a cone of base radius r and height 2·r and a sphere of radius r as follows;

Volume or sphere of radius r = Volume of cylinder of radius r and height 2·r - Volume of cone of base radius r and height 2·r

∴ 4/3·π·r³ = Volume of cylinder of radius r and height 2·r  - 2/3·π·r³

Hence, volume of cylinder of radius r and height 2·r = 4/3·π·r³ + 2/3·π·r³ = 2·π·r³

Hence the subtraction method is used to find the volume of the cylinder by recalling that the volume of the cylinder consist of the volume of the cone and the volume of the sphere.

7 0
2 years ago
Cheryl bought a sandwith or 5 1/2 dollars and a drink for $2.60 if she paid for her meal with $10 bill,how much money did she ha
QveST [7]

Answer:

$1.90

Step-by-step explanation:

8 0
2 years ago
Calculate using Cauchys integral formula
zhuklara [117]

Answer:

9πi/2

Step-by-step explanation:

\oint\limits_C {\frac{5z^{2}+4}{(z-1)(z+3)} } \, dz,\ C: |z|=2

Let f(z) = (5z² + 4) / (z + 3).

\oint\limits_C {\frac{f(z)}{z-1} } \, dz,\ C: |z|=2

Using Cauchy's integral formula:

2\pi i\ f(1)\\2\pi i\ (\frac{5(1)^{2}+4}{1+3}) \\2\pi i\ (\frac{9}{4}) \\\frac{9\pi i}{2}

5 0
2 years ago
Pls helppp me this is very very urgent
Nat2105 [25]

Answer:

1. 5040

2. 20

Step-by-step explanation:

1. using the formula for permutation

nPr=n!/(n-r)!

10P4 = 10!/(10-4)!

=10*9*8*7*6!/6!

then we are left with

=10*9*8*7

=5040

2.using the formula for combination

nCr=n!/(n-r)!r!

6C3=6!/(6-3)!3!

=6*5*4*3!/3!3!

=6*5*4/3*2*1

=20

4 0
3 years ago
The temperature was 13 °F and then fell 5 degrees. What was the final temperature?
AURORKA [14]
temp is 65 degrees
6 0
2 years ago
Read 2 more answers
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