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faltersainse [42]
3 years ago
10

21. What is the value of x if 5:(3x+2) = 7:(5x-2).A. 6B. 5C.7.​

Mathematics
1 answer:
KatRina [158]3 years ago
6 0

Answer:

5/(3x+2) = 7/(5x-2)

<=>5*(5x-2) = 7*(3x+2) (x is not equal to -3/2 or 2/5)

<=> 25x -10 = 21x +14   (x is not equal to -3/2 or 2/5)

<=> 4x = 24                   (x is not equal to -3/2 or 2/5)

<=> x = 6 (valid)

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The number that, when increased by 30% equals 78
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Answer:

60

Step-by-step explanation:

x + 0.30x = 78

1.30x = 78

x = 60

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Through: (3, 4), slope = -2​
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y = -2x - 2

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emmasim [6.3K]

Answer:

110

Step-by-step explanation:

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6 0
2 years ago
It is assumed that the time customers spend in a record store is uniformly distributed between 3 and 12 minutes. Based on this i
monitta

Answer:

0% probability that a customer will be exactly 7.50 minutes in the record store.

Step-by-step explanation:

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An uniform distribution has two bounds, a and b.  

The probability of finding a value of at lower than x is:

P(X < x) = \frac{x - a}{b - a}

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The probability of finding a value above x is:

P(X > x) = \frac{b - x}{b - a}

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0% probability that a customer will be exactly 7.50 minutes in the record store.

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