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2 years ago

Which could be a step used when solving the equation 5x + 10 = 7.5x

Mathematics

2 answers:

Aloiza [94]2 years ago

8 0

5x + 10 = 7.5x
-5x. -5x subtract -5x from both sides
+10 = 2.5x
——————. divide 2.5 from both sides
2.5. 2.5
4 = x
x = 4

svlad2 [7]2 years ago

6 0

Answer:

x = 4

Move variables to the right and constants to the left. Then divide.

Step-by-step explanation:

5x + 10 = 7.5x (Given)

-2.5x = -10 (subtraction property of equality)

x = 4 (division property of equality)

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Step-by-step explanation:

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2 years ago

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iris [78.8K]

Answer:

D. $\frac{2}{5}$

Step-by-step explanation:

Since we know that the odds of an events can be found by dividing the probability that an event will occur by the probability that the event will not occur.

$\text{Odds of an event}=\frac{\text{Probability that event will occur}}{\text{Probability that event will not occur}}$

Probability of an event not occurring can be found by subtracting probability of the event occurring from 1.

$\text{Odds of an event}=\frac{\text{Probability that event will occur}}{1-\text{Probability that event will occur} }$

We have been given that probability of an event is 2/7.

Upon substituting our given values in above formula we will get,

$\text{Odds of the given event}=\frac{\frac{2}{7}}{1-\frac{2}{7}} }$

$\text{Odds of the given event}=\frac{\frac{2}{7}}{\frac{7-2}{7}} }$

$\text{Odds of the given event}=\frac{\frac{2}{7}}{\frac{5}{7}} }$

$\text{Odds of the given event}=\frac{2}{7}\times \frac{7}{5}$

$\text{Odds of the given event}=\frac{2}{5}$

Therefore, the odds of the same event are $\frac{2}{5}$ and option D is the correct choice.

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2 years ago