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3 years ago

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Mathematics

2 answers:

Galina-37 [17]3 years ago

8 0

Answer:

The answer is 3.

Step-by-step explanation:

Since you do the parentheses first, you will figure out what why is. Y = 3, because 3*3 =9, and 9-9=0.

alexdok [17]3 years ago

8 0

Answer:

y = 3

Step-by-step explanation:

3(3y − 9) = 0

To solve the above do the following:

Divide both side by 3, we have:

3y — 9 = 0

Next, collect like terms

3y = 9

Next, divide both side by the coefficient of y i.e 3

y = 9/3

y = 3

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Under what condition the composite function of any two function is an identity function?

Veseljchak [2.6K]

Answer:

under the condition of f(x)=x composite function is an identity one

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2 years ago

Suppose quantity s is a length and quantity t is a time. Suppose the quantities v and a are defined by v = ds/dt and a = dv/dt.

finlep [7]

Answer:

a) $v = \frac{[L]}{[T]} = LT^{-1}$

b) $a = \frac{[L}{T}^{-1}]}{{T}}= L T^{-1} T^{-1}= L T^{-2}$

c) $\int v dt = s(t) = [L]=L$

d) $\int a dt = v(t) = [L][T]^{-1}=LT^{-1}$

e) $\frac{da}{dt}= \frac{[L][T]^{-2}}{T} = [L][T]^{-2} [T]^{-1} = LT^{-3}$

Step-by-step explanation:

Let define some notation:

[L]= represent longitude , [T] =represent time

And we have defined:

s(t) a position function

$v = \frac{ds}{dt}$

$a= \frac{dv}{dt}$

Part a

If we do the dimensional analysis for v we got:

$v = \frac{[L]}{[T]} = LT^{-1}$

Part b

For the acceleration we can use the result obtained from part a and we got:

$a = \frac{[L}{T}^{-1}]}{{T}}= L T^{-1} T^{-1}= L T^{-2}$

Part c

From definition if we do the integral of the velocity respect to t we got the position:

$\int v dt = s(t)$

And the dimensional analysis for the position is:

$\int v dt = s(t) = [L]=L$

Part d

The integral for the acceleration respect to the time is the velocity:

$\int a dt = v(t)$

And the dimensional analysis for the position is:

$\int a dt = v(t) = [L][T]^{-1}=LT^{-1}$

Part e

If we take the derivate respect to the acceleration and we want to find the dimensional analysis for this case we got:

$\frac{da}{dt}= \frac{[L][T]^{-2}}{T} = [L][T]^{-2} [T]^{-1} = LT^{-3}$

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3 years ago

Write 7/14 • (-7/12) in lowest terms

Marizza181 [45]

The final answer should be -49/168.

3 0

3 years ago

What is the prime factorization of 108

Anika [276]

☆What is the prime factorization of 108?

To find the prime factorization, first divide 108 by 2.

$108 \div 2 = 54$

You have 2 numbers: 54 and 2. 2 is a prime number and 54 isn't. Divide 54 by 2 until every factor of 54 is prime.

★ Prime number collection: 2

$54 \div 2 = 27$

Add 2 to the "prime number collection". Divide 27 by factors until every factor you find is prime.

★ Prime number collection: 2, 2

$27 \div 3 = 9$

Add 3 to the "prime number collection". Divide 9 by a factor of it to find more prime numbers.

★ Prime number collection: 2, 2, 3

$9 \div 3 = 3$

The two 3's are prime. No more dividing! Add those to the "prime number collection".

★ Prime number collection: 2, 2, 3, 3, 3

Multiply all the numbers in your "prime number collection".

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6 0

3 years ago

In order to select new board members, the French club held an election. 70% of the 90 members of the club voted. How many member

Deffense [45]

Answer:

63 members.

Step-by-step explanation:

70% of the votes means that every 100 people, 70 went to cast their ballot, or 7 every 10. Now in the club there are 9 groups of 10 people, so 9x7 = 63 people

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2 years ago