1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
son4ous [18]
3 years ago
8

Find the value of x - if x^3-7x² - x = 0a) 17 (b) 71 c) 7d) 1​

Mathematics
1 answer:
S_A_V [24]3 years ago
6 0

Answer:

x = 0

Step-by-step explanation:

x^3-7x^2-x =0\\

Take out common factor

x(x^2-7x-1) = 0

The factor inside the parenthesis cannot be factored

Since there is a common factor that we pulled out of the original equation,

set that x equal to zero and solve

x = 0\\ : Therefore x = 0

You might be interested in
"You measure 34 dogs' weights, and find they have a mean weight of 67 ounces. Assume the population standard deviation is 13.5 o
liraira [26]

Answer:

The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96*\frac{13.5}{\sqrt{34}} = 4.54

The lower end of the interval is the sample mean subtracted by M. So it is 67 - 4.54 = 62.46 ounches.

The upper end of the interval is the sample mean added to M. So it is 67 + 4.54 = 71.54 ounces.

The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.

7 0
3 years ago
tomika plans to run 84 miles in 4 weeks. If she continues the pattern, how many miles will she run in 1yr.
drek231 [11]
She run in 28 days = 84 miles
So, 1 day, it will be = 84 / 28 = 3 miles

Now, in 1 year it would be = 365 * 3 = 1095

So, your final answer is 1095 miles

Hope this helps!
4 0
3 years ago
.For a hockey game, tickets are $220 for
Romashka [77]

Answer:

900 front row seats

Step-by-step explanation:

Tickets for front row seat = 220 dollars (y)

Cost of remaining seats ticket = 50 dollars (z)

Number of front row seats = x

Number of remaining seats = 2050 (w)

Total amount earned when stadium is full = 300,500 dollars (T)

so if we formulate this using our variables y,z,x,w and T problem it becomes:

y*x + z*w = T, which says the

Tickets for front row seat times Number of front row seats plus Cost of remaining seats ticket times Number of remaining seats gives us Total amount earned by the stadium.

220*x + 2050*50 = 300500

220*x = 300500-102500

220*x = 198000

divide both side by 220

x = 900

5 0
3 years ago
What is the answer to<br> -12 + 7 = __
bixtya [17]

Answer:

-5

Step-by-step explanation:

an easy way to do it is to flip it so its 7-12 or you can do 12-7 and you get 5 then just add a - sign but thats my way and its weird lol

6 0
3 years ago
Read 2 more answers
Find the equation of the line that is perpendicular to the line y = (-1/3)x -1 and passes through the point (1, 5)?
Anit [1.1K]

bearing in mind that perpendicular lines have negative reciprocal slopes, so


\bf \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}~\hspace{10em}\stackrel{slope}{y=\stackrel{\downarrow }{-\cfrac{1}{3}}x-1} \\\\[-0.35em] ~\dotfill


\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}} {\stackrel{slope}{-\cfrac{1}{3}}\qquad \qquad \qquad \stackrel{reciprocal}{-\cfrac{3}{1}}\qquad \stackrel{negative~reciprocal}{+\cfrac{3}{1}\implies 3}}


so we're really looking for a line whose slope is 3 and runs through (1,5)


\bf (\stackrel{x_1}{1}~,~\stackrel{y_1}{5})~\hspace{10em} slope = m\implies 3 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-5=3(x-1) \\\\\\ y-5=3x-3\implies y=3x+2

4 0
3 years ago
Other questions:
  • Express tan B as a fraction in simplest form.
    15·1 answer
  • Good Stuff is giving away free pens to each of the first 200 people who come in the store today. In the first hour, they gave aw
    5·2 answers
  • Alex just received an increase in wage of $2.75 per hour. Before the raise went into effect, he was earning $14.05 per hour. How
    5·1 answer
  • HELP PLEASE FAST!!!!!!!
    13·1 answer
  • An orange is divided into 6 equal wedges.Jody eats 1 wedges.How much of the orange did Jody eat?
    7·2 answers
  • An Electrician charges $30 for a service call plus $75 per hour of service. If he charged 210 how many hours did he work?
    13·1 answer
  • The perimeter of a square is 7.2 meters how long is each side ?
    5·2 answers
  • You have 2/3 of sugar how muck sugar will you use if you makes 6 batches of cookies
    5·1 answer
  • Find the sale price.<br> Original price: $50<br><br> Discount: 15%<br><br> Sale price: $
    12·2 answers
  • What is the slope of the line shown?<br><br> (0,6)<br><br> (-2,0)<br> Underfined 6,3,0
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!