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HACTEHA [7]
3 years ago
11

2/5k - 3 1/2. K= 15 EVALUATE

Mathematics
2 answers:
katen-ka-za [31]3 years ago
8 0
Exact form
K=-150\31

MrRissso [65]3 years ago
8 0

Answer:

Solving the expression: \frac{2}{5}K-3\frac{1}{2}K  =15 we get \mathbf{K=\frac{-150}{31} \ or \  \ K=-4\frac{26}{31} }

Step-by-step explanation:

We need to solve the expression: \frac{2}{5}K-3\frac{1}{2}K  =15 and find value of k

Solving:

\frac{2}{5}K-3\frac{1}{2}K  =15

Convert mixed fraction into improper fraction

\frac{2}{5}K-\frac{7}{2}K  =15

Taking LCM of 5 and 2 we get 10

\frac{2*2K-7*5K}{10}  =15\\\frac{4K-35K}{10}  =15\\\frac{-31K}{10}  =15

Divide both sides by -31/10

\frac{-31K}{10}*\frac{-10}{31}=15*  \frac{-10}{31}\\K=\frac{-150}{31} \\K=-4\frac{26}{31}

So, solving the expression: \frac{2}{5}K-3\frac{1}{2}K  =15 we get \mathbf{K=\frac{-150}{31} \ or \  \ K=-4\frac{26}{31} }

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3 years ago
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3 years ago
Find the dimensions of the rectangle with area 289 square inches that has minimum perimeter, and then find the minimum perimeter
nalin [4]
 <span>To minimize the perimeter you should always have a square. 
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To see , try starting at length 1, and gradually increase the length. 
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4 years ago
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3 years ago
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