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LekaFEV [45]
4 years ago
11

Y = 7x − 7z − 9 Solve for X

Mathematics
1 answer:
Novay_Z [31]4 years ago
6 0
Y= 7x - 7z -9
+9             +9             Y+9+7z /7=x
Y+9 = 7x - 7z
+7z          +7z
Y+9+7z = 7x
/7              /7          


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A circle with a diameter of 10 inches has a circumference of a square, what is the length of each side of the square? ​
Veronika [31]

The circumference is πd, and the diameter is 10, so the circumference is 10π. All sides of a square are equal, so the length of each side is 10π/4, which is 2.5π.

The length of each side of the square is 2.5π  

7 0
4 years ago
Simplify and Evaluate
zalisa [80]
\dfrac{2^{-1} + 5^{-1}}{10^{-1} - 5^{-2}} =

= \dfrac{\frac{1}{2} + \frac{1}{5}}{\frac{1}{10} - \frac{1}{5^2}}

=\dfrac{\frac{1}{2} + \frac{1}{5}}{\frac{1}{10} - \frac{1}{25}}

=\dfrac{\frac{5}{10} + \frac{2}{10}}{\frac{5}{50} - \frac{2}{50}}

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= \frac{7}{1} \times \frac{5}{3}

= \frac{35}{3}


4 0
3 years ago
triangle ABC is isosceles, angle B is vertex angle , AB = 20x -2, AC =25x, and BC =12 x +20. Find x and the length of each side
lisov135 [29]

Length of AB = 18. 92

Length of AC = 26. 15

Length of BC = 32. 552

<h3>How to determine the sides of the triangle</h3>

Using the Pythagorean theorem, we have that

(20 x-2)^2 = (12x + 20)^2 + (25x)^2

Expand the bracket

400x^2- 4 = 144x^2 + 400 + 625x^2

Collect like terms

400x^2 - 144x^2 - 625x^2 = 400 + 4

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Make x^2 subject

x^2 = \frac{404}{369}

x = \sqrt{1.0948}

x = 1. 046

Thus,

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Length of AC = 25x = 25* 1.046 = 26. 15

Length of BC = 12x + 20 = 12(1. 046) + 20 = 32. 552

Learn more about isosceles triangles here:

brainly.com/question/1475130

#SPJ1

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2x+5=y this should be correct.
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Sales tax on an item is directly proportional to the cost of the item purchased. If the tax on a 600 item is 36, what is the sal
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The sales tax $950 item would be $57. Hope this helps!
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