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Tamiku [17]
3 years ago
15

-5x+8y=42 find the value of y when x equals 6

Mathematics
1 answer:
marissa [1.9K]3 years ago
5 0
Y=9 is the answer.....
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In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies. They describe ad agency outp
fredd [130]

Answer: (7.27%, 7.55%)

Step-by-step explanation:

As per given , we have

Sample size : n= 392

Sample mean : \overline{x}=7.41\%

\sigma=1.43\%

Critical two-tailed z-value for 95% confidence = z_{\alpha/2}=1.96

Required confidence interval would be :

7.41\%\pm (1.96)\dfrac{1.43\%}{\sqrt{392}}\\\\=7.41\%\pm 0.14\%\\\\=(7.27\%, 7.55\%)

Hence, the required 95% confidence interval for the mean percentage share of billing volume from network television for the population of all U.S. advertising agencies : (7.27%, 7.55%)

7 0
3 years ago
Write an equation for line L in point-slope form and slope-intercept form.
Marianna [84]

Answer:

y = -\frac{1}{4}x + c --- Slope intercept

y - y_1 = -\frac{1}{4}(x - x_1) --- Point slope

Step-by-step explanation:

Given

Perpendicular to y = 4x

Required

Determine its equation

The general form of an equation is:

y = mx + c

Where

m = slope

By comparison:

m = 4

Next, we calculate the slope of L.

Because L is perpendicular to y = 4x, the relationship between their slopes is:

m_2 = -\frac{1}{m}

Substitute 4 for m

m_2 = -\frac{1}{4}

The equation of L in slope intercept form is: y = mx + c

Substitute -1/4 for m

y = -\frac{1}{4}x + c

In point slope form, we have:

y - y_1 = m(x - x_1)

Substitute -1/4 for m

y - y_1 = -\frac{1}{4}(x - x_1)

5 0
2 years ago
PLEASE HELP ASAP . PLEASE
arsen [322]

Answer:

18.3%

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Is x ^ 2 + y ^ 2 = 6 a function?
oee [108]

Answer:

not a function

Step-by-step explanation:

for example

In order for an equation to represent a function any single value of x must have at most one corresponding value of y which satisfies the equation.

For x2+y2=9

XXXXif (for example) x=0

XXXXthere are two values for y (namely +3 and −3) which satisfy the equation

and therefore the equation is not a function.

3 0
2 years ago
URGENT!! ILL GIVE<br> BRAINLIEST! AND 100 POINTS <br><br> The answer is not D
Verdich [7]

Answer:

b

Step-by-step explanation:

3 0
11 months ago
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