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jenyasd209 [6]
3 years ago
11

2x - 1 = 7 I need help with this equation

Mathematics
2 answers:
77julia77 [94]3 years ago
5 0

Answer:

×=4

Step-by-step explanation:

2x-1=7. so you have to add the 1 to both sides.

2x=8. then you divide the 2 on both sides to get x by itself.

x=4

KonstantinChe [14]3 years ago
4 0

Answer:

x = 4

Step-by-step explanation:

2x - 1 = 7

7 + 1

= 8

2x = 8

x = 4

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Rewrite the expression with a rational exponent as a radical expression.
tatiyna

Answer:

First option is correct.

\sqrt[10]{4}

Step-by-step explanation:

Given:

The given expression is (4^{\frac{2}{5}})^{\frac{1}{4}}

We write the given expression with a rational exponent as a radical expression such as.

=(4^{\frac{2}{5}})^{\frac{1}{4}}

Simplify the above equation by multiplication of powers.

=(4^{\frac{2}{5}\times \frac{1}{4}})

=(4^{\frac{1}{5}\times \frac{1}{2}})

=(4^{\frac{1}{5\times 2}})

=(4^{\frac{1}{10}})

=\sqrt[10]{4}

Therefore, The answer is =\sqrt[10]{4}.

4 0
3 years ago
How do you convert kilometers to meters
NARA [144]

Answer:

1 kilometer is 1000 meters, so you multipy 1000 meters by the number of kilometers.

Step-by-step explanation:

1 kilometer = 1000 meters

<em>Hope this helped!!!! =)</em>

8 0
2 years ago
If electricity power failures occur according to a Poisson distribution with an average of 3 failures every twenty weeks, calcul
Wittaler [7]

Answer:

0.9898 = 98.98% probability that there will not be more than one failure during a particular week.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

In which

x is the number of sucesses

e = 2.71828 is the Euler number

\mu is the mean in the given interval.

3 failures every twenty weeks

This means that for 1 week, \mu = \frac{3}{20} = 0.15

Calculate the probability that there will not be more than one failure during a particular week.

Probability of at most one failure, so:

P(X \leq 1) = P(X = 0) + P(X = 1)

Then

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

P(X = 0) = \frac{e^{-0.15}*0.15^{0}}{(0)!} = 0.8607

P(X = 1) = \frac{e^{-0.15}*0.15^{1}}{(1)!} = 0.1291

Then

P(X \leq 1) = P(X = 0) + P(X = 1) = 0.8607 + 0.1291 = 0.9898

0.9898 = 98.98% probability that there will not be more than one failure during a particular week.

6 0
2 years ago
K(t) = 10t - 19<br> k(-5) =
DanielleElmas [232]

Answer:

-69

Step-by-step explanation:

k(-5) = 10*-5 -19

= -50-19

=-69

6 0
3 years ago
Read 2 more answers
Due SOON!!
DedPeter [7]

Answer:

?=19

x=30

Step-by-step explanation:

5/6x - 1/5x = 19

5(5/6x) - 6(1/5x) = 19

25/30x-6/30x=19

19/30x=19

19x=19(30)

19x=570

x= 570/19

x=30

6 0
2 years ago
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