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2 years ago

5/7x - 1/3x = 8 Plz help me due today

Mathematics

2 answers:

mars1129 [50]2 years ago

8 0

Answer:

x= 21

Step-by-step explanation:

look at the attachment

hope this helps

plz don't report

Ugo [173]2 years ago

7 0

Answer:

x=21

Step-by-step explanation:

hope that helps

Let's solve your equation step-by-step.

5/7x−1/3x=8

Step 1: Simplify both sides of the equation.

5/7x 1/3x=8

5/7x+ −1/3x=8

(5/7x+ −1/3x)=8(Combine Like Terms)

8/21 x=8

8/21x=8

Step 2: Multiply both sides by 21/8.

(21/8)*(8/21x)=(21/8)*(8)

Answer:

x=21

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Answer:

Part 1) The expression for the perimeter is $P=4(25z-3)$ or $P=100z-12$

Part 2) The perimeter when z = 15 ft. is $P=1,488\ ft$

Step-by-step explanation:

Part 1)

we have

$625z^{2}-150z+9$

Find the roots of the quadratic equation

Equate the equation to zero

$625z^{2}-150z+9=0$

Complete the square

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$625z^{2}-150z=-9$

Factor the leading coefficient

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Complete the square. Remember to balance the equation by adding the same constants to each side

$625(z^{2}-(6/25)z+(36/2,500))=-9+(36/4)$

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Rewrite as perfect squares

$625(z-6/50)^{2}=0$

$z=6/50=0.12$ -----> root with multiplicity 2

The area is equal to

$A=625(z-0.12)(z-0.12)=[25(z-0.12)][25(z-0.12)]=(25z-3)^{2}$

The length side of the square is $b=(25z-3)$

therefore

The perimeter is equal to

$P=4b$

$P=4(25z-3)$

$P=100z-12$

Part 2) Find the perimeter when z = 15 ft.

we have

$P=100z-12$

substitute the value of z

$P=100(15)-12=1,488\ ft$

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