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mafiozo [28]
3 years ago
9

-7a = 35 a=? I am very anxious, if you know the answer, please do tell me, thank you.

Mathematics
2 answers:
Amanda [17]3 years ago
6 0

Step-by-step explanation:

a = -5

plz mark my answer as brainlist plzzzz vote me also ...

Rashid [163]3 years ago
4 0

Answer:

-5

Step-by-step explanation:

divide 35 by -7

a is isolated

a=-5

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How to figure the diameter if you know circumference , the circumference is 10
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Read 2 more answers
Help me class8 (surds)​
Mashcka [7]

Answer:

  • \cfrac{991\sqrt{2} }{80}

Step-by-step explanation:

For a start simplify each of the roots:

  • \sqrt{72} =\sqrt{36*2} =6\sqrt{2}
  • \sqrt{50} =\sqrt{25*2} =5\sqrt{2}
  • \sqrt{128} =\sqrt{64*2} =8\sqrt{2}
  • \sqrt{98} =\sqrt{49*2} =7\sqrt{2}

Now simplify the expression in steps:

\sqrt{72}-\cfrac{48}{\sqrt{50} }  -\cfrac{45}{\sqrt{128} }  +2\sqrt{98} =

6\sqrt{2}-\cfrac{48}{5\sqrt{2} }  -\cfrac{45}{8\sqrt{2} }  +2*7\sqrt{2} =

6\sqrt{2}-\cfrac{48*8+45*5}{5*8\sqrt{2} }  +14\sqrt{2} =

20\sqrt{2}-\cfrac{609}{40\sqrt{2} } =

20\sqrt{2}-\cfrac{609*\sqrt{2} }{40\sqrt{2} *\sqrt{2} } =

20\sqrt{2}-\cfrac{609\sqrt{2} }{40*2 } =

20\sqrt{2}-\cfrac{609\sqrt{2} }{80 } =

\sqrt{2} (20-7\cfrac{49}{80} )=

\sqrt{2} *12\cfrac{31}{80} =

\cfrac{991\sqrt{2} }{80}

3 0
2 years ago
A new department store needs a new rectangular parking lot to encompass the store. The front of the department store is 200 feet
xz_007 [3.2K]
The store's dimensions are 200 ft on the north and south side and 100 feet on the east and west sides. 

<span>To this add the following amount of blacktop. </span>

<span>E = x </span>
<span>S = x </span>
<span>W = 10x </span>
<span>N = 8x </span>

<span>So the store's lot is going to be 200 + E + W = 200 + 11x from east to west and 100 + N + S = 100 + 9x from north to south. </span>

<span>The total area of the space occupied is (200 + 11x)(100 + 9x) = 20000 + 2900x + 99x^2 </span>

<span>From this, subtract the area of the store (200 x 100 = 20000) </span>

<span>And what you get is that 99x^2 + 2900x = 38900 for the amount of blacktop needed to pave this parking lot. </span>

<span>99x^2 + 2900x - 38900 = 0 </span>

<span>x = (-2900 +/- sqrt(2900^2 - 4 * 99 * -38900)) / (2 * 99) </span>
<span>x = (-2900 +/- sqrt(8410000 + 15404400)) / 198 </span>
<span>x = (-2900 +/- sqrt(23814400)) / 198 </span>
<span>x = (-2900 +/- 4880) / 198 </span>
<span>x = --7780/198 or 1980/198 </span>
<span>x = 10 </span>

<span>The west side of the parking lot is 100 feet.
</span>
3 0
3 years ago
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