So I need a little help here... I just learn this and I'm horrible at math :( Please state each steps clearly and explain them too (if you can, if not it's ok) Thanks!

Answers

Answer 1

Answer: $y = \sqrt{ (5x+3)/(x-5) }$
$y^(2) = (5x+3)/(x-5)$
Transpose the equation to eliminate any fractions:
$y^(2)(x-5) = 5x+3$
Expand the brackets:
$x y^(2) - 5 y^(2) = 5x+3$
Put x terms on one side and the others on the other side:
$xy^(2) - 5x = 5y^(2)+3$
Factorise to take x out of the terms:
$x(y^(2) - 5) = 5 y^(2) +3$
Transpose to leave only x on the left hand side of the equation:
∴ $x = (5 y^(2) + 3 )/( y^(2) -5 )$

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I need help Brainliest

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It takes 32 minutes for 3 people to paint 4 walls. How many minutes does it take 4 people to paint 7 walls?

Answers

we order these data:

32 minutes------------------------3 people------------------4 walls
x--------------------------------------4 people------------------7 walls
The minutes and the people are variables inversely proportional , therefore, we multiply in parallel
32 minutes*3 people=x*4 people

The minutes and the walls are variables directly proportinal; therefore, we multiply cross.
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Therefore:
32 minutes*3 people*7 walls=x*4 people*4 walls
x=(32 minutes*3 people*7 walls) / (4 people* 4 walls)
x=42 minutes.

Answer: the time will be 42 minutes.

Answer:

Step-by-step explanation:

that is the answer on khan academy

hope that helped!

a thanks would be appreciated! ;)

Five years ago, Rhea put $20,000 into savings. Now it's worth $30,000. Which of the following statements is true for this situation?

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What is 288 divided by 30?

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easy 288/30=9.6 and tell me if you need the step-by-step

Which is an equation of a circle with center (5, 0) that passes through the point (1, 1)? HELP ME PLEASE!! Answer Choices:

A.) (x - 1)2 + (y - 1)2 = 17
B.) (x + 5)2 + y2 = 17
C.) (x + 5)2 + y2 = 24
D.) (x - 5)2 + y2 = 17

Answers

a) first we will calculate the distance between center and given point because this is the radius of circle:

$d=√((1-5)^2+(1-0)^2)\n \n d=√((-4)^2+1)=√(17)$

b) Now we will write the equation of the circle:

$\boxed{\boxed{(x-5)^2+y^2=17}}$

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