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2 years ago

Solve for x. 6⁢x + 15 = 2

Mathematics

2 answers:

Vladimir [108]2 years ago

4 0

Answer:

-2.167

Step-by-step explanation:

6X = 2-15

6X = -13

X= -13 / 6

pishuonlain [190]2 years ago

4 0

Answer:

-2 $\frac{1}{6}$

Step-by-step explanation:

Given : 6x + 15 = 2

Subtraction Property of Equality : 6x = -13

Division Property of Equality : x = -2.166...

-2.1666... = -2 $\frac{1}{6}$

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A game stop membership cost $20 and includes one game A month for five dollars. Nonmembers can get one more game a month for sev

miss Akunina [59]

Answer:

C(x) = 5x + 20 (for members)

C(x) = 3.5x (for non-members)

Step-by-step explanation:

Cost of membership = $20

Price of a game per month = $5

So, the linear equation to compute the total cost for a member can be computed by:

C(x) = 5x + 20

where x is the number of games per month

On the other hand, non-members can get one more game per month for $7 which means they get 2 games for $7. The price for a single game is $7/2 = $3.5 a month.

The linear equation to compute the total cost for a non-member is:

C(x) = 3.5x

where x is the number of games per month.

The following system of equations can be used to decide whether to become a member or not, by substituting the number of games in place of x and finding out the total cost.

C(x) = 5x + 20 (for members)

C(x) = 3.5x (for non-members)

3 0

2 years ago

Use the commutative property of multiplication to write a related multiplication sentence 3 x 4 = 12

V125BC [204]

4x3=12. The commutative property of multiplication says that two numbers can multiplied either way without getting another answer.

3 0

2 years ago

An isosceles trapezoid with bottom base 26.5 decimeters, top base 8.5 decimeters, and height 9 decimeters. Find the area. a. 238

Tamiku [17]

Answer:

I don't understand can you explain it differently?

6 0

2 years ago

g If a random sample of 18 deliveries was selected instead and the standard deviation of these delivery times was found to be 9.

lana [24]

Answer:

We can use the z score formula given by:

$z= \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

If we use this formula we got:

$z=\frac{21-20}{\frac{9.31}{\sqrt{18}}}= 0.456$

$z=\frac{25-20}{\frac{9.31}{\sqrt{18}}}= 2.279$

And using a calculator, excel or the normal standard table and we have that:

$P(0.456$

Step-by-step explanation:

We assume this previous info: It is known that the amounts of time required for room-service delivery at a certain Marriott Hotel are Normally distributed with the average delivery time of 20 minutes.

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the delivery times of a population, and for this case we know the distribution for X is given by:

$X \sim N(20,9.31)$