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Answer 1

Answer:

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Step-by-step explanation:

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$(2a + 4b)/(2b) = 3.9 \n (a)/(b) = what$
with full explanation please

Answers

Answer: 1.9

Work Shown:

$(2a+4b)/(2b) = 3.9\n\n(2a)/(2b)+(4b)/(2b) = 3.9\n\n(a)/(b)+2 = 3.9\n\n(a)/(b) = 3.9-2\n\n(a)/(b) = 1.9\n\n$

What is the approximate area of a circle whose radius is 3 m long? (Use 3.14 for pi.)

Answers

Area of a circle (formula) = $\pi$ r²
=(3)² $\pi$
=9 $\pi$ (using 3.14 as $\pi$ )
=28.26 m²

Let be the integers a,b,c with $a^2-4b=c^2$

To be shown that the number $a^2-2b$ can be written as a sum of 2 perfect squares.

Answers

a^2 - 4b = c^2 <=> a^2 - c^2 = 4b <=> ( a + c )( a - c ) = 4b, cu a, b, c nr. intregi ;
Avem doua posibilitati :
a) a = 2x si b = 2y;
Atunci ( a + c )( a - c ) = 4b <=> x^2 - y^2 = b;
Relatia a^2 -2b devine 2x^2 +2y^2 = ( $√(2) x$ )^2 + ( $√(2) y$ )^2, adica suma a doua patrate perfecte ;

b) a = 2x + 1 si b = 2y + 1 ;
In mod analog. obtii ca x^2 - y^2 + x - y = b;
si, dupa ce prelucrezi, ai ca a^2 - 2b = [ $√(2) ( x + 1 / 2 )$ ]^2 + [] $√(2) ( y + 1 / 2 )$ ^2, adica, suma a doua patrate perfecte .

Bafta!

${ a }^( 2 )-4b={ c }^( 2 )\n \n { a }^( 2 )-4b+2b={ c }^( 2 )+2b\n \n { a }^( 2 )-2b={ c }^( 2 )+{ \left( \sqrt { 2b } \right) }^( 2 )$

$b={ 2 }^( n )\n \n n>0$

(n) is the set of odd natural numbers greater than 0.

A pelican consumes 33 1/3% of its body weight in one meal. Write this percent as a fraction in simplest form.

Answers

$33(1)/(3)\%=(33\cdot3+1)/(3)\%=(99+1)/(3)\%=(100)/(3)\%\n\n\n\n(100)/(3)\%=(100)/(3):100=(100)/(3)\cdot(1)/(100)=(1)/(3)$

Answer:1/3

Step-by-step explanation:

3x + 7y, 8x + 4y, 13x + y, 18x - 2y, 23x - 5y, ...

Answers

☆Let's simplify step-by-step:
☆Question you asked:
3x+7y(8)x+4y(13)x+y(18)x−2y(23)x−5y
=3x+56xy+52xy+18xy+−46xy+−5y

☆Combine Like Terms:
=3x+56xy+52xy+18xy+−46xy+−5y
=(56xy+52xy+18xy+−46xy)+(3x)+(−5y)

☆Answer:
=80xy+3x+−5y

☆I hope this helps!☆

- - Solve:
$3x+7y(8)x+4y(13)x+y(18)x-2y(23)x-5y$

- - Solve again:

$=3x+56xy+52xy+18xy+-46xy+-5y$

- - Now we need to Combine Like Terms:
= $=3x+56xy+52xy+18xy+-46xy+-5y$

= $(56xy+52xy+18xy+-46xy)+(3x)+(-5y)$

= $80xy+3x+-5y$

- - Final answer:
$80xy+3x-5y$

✡ Hope this helps! ✡

Plz help with questions number 1 and 2