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Oliga [24]
3 years ago
6

5.5 times a number is fourteen

Mathematics
2 answers:
Anni [7]3 years ago
8 0

Answer:

x = 2.55 (rounded)

x = 2. 5454545455 (exact)

Step-by-step explanation:

We can change this sentence, into a mathematical expression and solve:

5.5 · x = 14

x = 14 / 5.5

x = 2.5454545

x = 2.55 (rounded)

Hope this helps!!

Sonja [21]3 years ago
7 0
5.5 • x = 14
14/5.5 = 2.55
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Subtract 32 to both sides to the equation becomes -5x^2 + 7x + 9 = 0.

To solve this equation, we can use the quadratic formula. The quadratic formula solves equations of the form ax^2 + bx + c = 0
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                   x = [ -7 ± √(7^2 - 4(-5)(9)) ] / ( 2(-5) )
                   x = [ -7 ± √(49 - (-180) ) ] / ( -10 )
                   x = [ -7 ± √(229) ] / ( -10)
                   x = [ -7 ± sqrt(229) ] / ( -10 )
                   x = 7/10 ± -sqrt(229)/10
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3 years ago
An angle whose measure is 90° can be classified as which type of angle?
Lena [83]
Right angle is the right answer
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yKpoI14uk [10]

y =  \frac{7}{5} x + 1
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3 years ago
1.6x=1.28<br> help me solve this
bogdanovich [222]

Answer:

Step-by-step explanation:

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7 0
3 years ago
Martha Jones received a $540 discount loan to purchase a new sewing machine. The loan was offered at 12.5% for 90 days. Find the
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