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
Andreyy89
2 years ago
14

El resultado de 9x^2 + 81 = 0

Mathematics
1 answer:
wlad13 [49]2 years ago
7 0
Como no entiendo lo que es es eso ?
You might be interested in
Mitch is replacing all the light bulbs in his home with energy efficient LED light bulbs. How many packages of 4 will he need to
lapo4ka [179]
C) 22

86/4 = 21.5
*5 Or more, raise the score*
(rounds to 22)
you should have 2 lightbulbs left over but you would be 2 lightbulbs short if you were to get 21 packages as opposed to 22
6 0
3 years ago
-1/5, 5/6,1.3,1 1/3, 5/3 -4/3 least to greatest
Sergeeva-Olga [200]
I DK I DK I DK I DK but maybe it’s already in that order
3 0
2 years ago
Read 2 more answers
Brett has a $30 online gift certificate. He plans to buy as many books as he can. The cost of each book is $4. There is also a s
kkurt [141]

Answer:

7 books

Step-by-step explanation:

make an equation

x = # of books each book is $4 so its 4x

the shipping fee no matter how many books he buys will be $2 so it's just 2

the equation looks like this:

4x + 2 = 30

we set equal to 30 cuz he can't spend more than $30

solve for x

4x = 30 -2

4x = 28

x = 7

Brett can buy no more than 7 books.

7 0
2 years ago
Restaurateur Denny Valentine is evaluating two sites, Raymondville and Rosenberg, for his next restaurant. He wants to prove tha
Aleksandr-060686 [28]

Answer:

\bar X_1 represent the sample for the sample 1

\bar X_2 represent the sample for the sample 2

s_1 represent the deviation for the sample 1

s_2 represent the deviation for the sample 2  

n_1 = 81 represent the sample size for the group 1

n_2 = 81 represent the sample size for the group 2

And on this case if we create the system of hypothesis we have this:

Null hypothesis :\mu_1 -\mu_2 \leq 0

Alternative hypothesis: \mu_1 -\mu_2 >0

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".  

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".  

On this caseHe wants to prove that Raymondville residents (population 1) dine out more often than Rosenberg residents (population 2). So this statement need to be on the alternative hypothesis. And the complement of the alternative hypothesis would be on the null hypothesis.  

Solution to the problem

We assume that we have the following statistics:

\bar X_1 represent the sample for the sample 1

\bar X_2 represent the sample for the sample 2

s_1 represent the deviation for the sample 1

s_2 represent the deviation for the sample 2  

n_1 = 81 represent the sample size for the group 1

n_2 = 81 represent the sample size for the group 2

And on this case if we create the system of hypothesis we have this:

Null hypothesis :\mu_1 -\mu_2 \leq 0

Alternative hypothesis: \mu_1 -\mu_2 >0

5 0
3 years ago
The carpet erin has chosen costs $2.50 per square foot . how much will it coast her to carpet the
baherus [9]
All you do is 2.5 times the number of feet so 2.5x , x is the number of feet
3 0
3 years ago
Other questions:
  • A gym charges a $49.95 activation fee and $17.50 per month for a membership. If you spend $364.95 for how many months do you hav
    15·1 answer
  • The area of the shaded triangles in the fractal shown form a geometric sequence. The area of the largest triangle (not shaded) i
    15·1 answer
  • Suppose the measure of angle 1 is 127 degrees. Find the measure of the other 3 angles:
    10·1 answer
  • Jack bought 4 bagels for 3.00. how many bagels can he buy for 4.50?
    5·2 answers
  • Answer the triangle
    11·2 answers
  • If 2 divided by 2 is 1 what is 1 divided by 1?
    12·2 answers
  • Help me out please thanks
    11·1 answer
  • What is 2 x 10 to the fourth power - 7 to the fourth power?
    8·1 answer
  • Please help!! markup and markdown word problems.
    15·1 answer
  • What is -15 = -5b ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!