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3 years ago

-2z-xy=x+7 for x show work please

1 answer:

8 0

Remember we can do anything to an equation as long as you do it to both sides

add xy to both sides
-2z=x+xy+7
minus 7 both sides
-2z-7=x+xy
undistribute x
-2z-7=x(1+y)
divide both sides by (1+y)
$\frac{-2z-7}{1+y}=x$
$x=\frac{-2z-7}{y+1}$

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A cab company charges $0.25 per 1 mile as well as a flat fee of $2.25 just for taking a ride in the

vivado [14]

Answer:

y - intercept = 2.25

Step-by-step explanation:

y = mx + c

Where,

y = Total cost

x = additional cost

m = slope

c = y - intercept

y = 0.25x + 2.25

Relating with the above equation,

y - intercept = 2.25

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3 years ago

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alina1380 [7]

16x34=544 rats the answer hope this would help

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3 years ago

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What is the rational number equivalent to 3 point 12 with a bar over 12?

slamgirl [31]

$\frac{12}{100}=0.12$

To get the 0.12 to repeat, the trick is to subtract 1 from the denominator

$\frac{12}{99}=0.12121212...$

Then reduce the fraction.

$\frac{12}{99}={4}{33}$

now add the 3 to get

$3.12121212.... = 3\frac{4}{33}$

8 0

4 years ago

Read 2 more answers

A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard dev

zimovet [89]

Answer:

$Z = 3.33$

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 13, \sigma = 1.2$

You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 17 minutes. Calculate the z-score for this amount of advertising time.

We have to find Z when X = 17. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{17 - 13}{1.2}$

$Z = 3.33$

5 0

3 years ago

Write and solve an equation to answer the question. after earning interest, the balance of a checking account is $560. the new b

nikitadnepr [17]

2.33 is the aprox number we start off with. if we got to find the original, we divide 560 by (7/3).
after we estimate the divisior we get 240. 560 - 240 gives us 320.
the answer could be 320.

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3 years ago