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elixir [45]
3 years ago
6

Simplify the expression -1/8-2/7

Mathematics
2 answers:
mafiozo [28]3 years ago
5 0

The result is in decimal form as 0.16071428

SpyIntel [72]3 years ago
4 0

the answer would be -\frac{23}{56} because you would need to find the LCD, which in this case would be 56 and you solve from there.

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If the surface area of a cube is 294, whats the length of the cube?
tatyana61 [14]

Answer:

7

Step-by-step explanation:

Total number of surfaces of cube are 6.

Each surface is square.

And area of square is (side)^2

That means, total surface area will be 6 * (side)^2

From question,

294 = 6 * (side)^2 ( Surface area given)

=> 294 ÷ 6 = ( side) ^2

=> 49 = side^2

=> √49 = side

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aliina [53]

Answer: X = 7√2

Step-by-step explanation:

Let first Consider triangle BDC,

Cos C = adjacent/ hypothenus

Cos C = 7 / x ...... (1)

Also, let consider triangle ABC

Cos C = adjacent / hypothenus

Cos C = x / 14 ....... (2)

Since angle C is the same, equate equation 1 to 2

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Cross multiply

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Make x the subject of formula

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X = sqrt (49) × sqrt (2)

X = 7 sqrt(2)

X = 7√2

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2 years ago
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