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
katovenus [111]
3 years ago
12

53b−7b−6b+1 if b=25 Please help me with this problem! And what is the simplified expression?

Mathematics
1 answer:
Nataly_w [17]3 years ago
7 0
You have to substitute 25 for b to simplify the expression.

53(25) -7(25) -6(25) +1
=1325 - 175 - 150 +1
=1001
You might be interested in
Which element is always present in a combustion reaction?
Alla [95]
Its "C" because without oxygen you can't have fire
4 0
3 years ago
A study is performed in San Antonio to determine whether the average weekly grocery bill per five-person family in the town is s
bogdanovich [222]

Answer:

No, the sample evidence is not statistically significant (P-value = 0.125).

To reject the null hypothesis, the P-value has to be smaller than the significance level, so the significance level to reject the null hypothesis has to be 0.125 or higher.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

Then, the null and alternative hypothesis are:

H_0: \mu=131\\\\H_a:\mu\neq 131

The significance level is 0.05.

The sample has a size n=50.

The sample mean is M=133.474.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=11.193.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{11.193}{\sqrt{50}}=1.583

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{133.474-131}{1.583}=\dfrac{2.474}{1.583}=1.563

The degrees of freedom for this sample size are:

df=n-1=50-1=49

This test is a two-tailed test, with 49 degrees of freedom and t=1.563, so the P-value for this test is calculated as (using a t-table):

P-value=2\cdot P(t>1.563)=0.125

As the P-value (0.125) is bigger than the significance level (0.05), the effect is  not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

8 0
2 years ago
Maria realiza una encuesta sobre las edades de los postulantes a una universidad y con los datos obtenidos elabora una tabla de
vazorg [7]

Answer:

Step-by-step explanation:

is 10 1/2

5 0
2 years ago
Write the word or phrase that best completes each statement or answers the question.
aniked [119]
I believe that the answer is A
5 0
3 years ago
The number of miles driven is proportional to the gallons of gasoline used. The graph shows this relationship. What is the unit
slamgirl [31]
I think the answer is 9.5 because that is the only number that can be multiplied by 4 that gives you 38. 
(4,38) = y=9.5x
6 0
3 years ago
Other questions:
  • Lacey measured a neighborhood park and made a scale drawing. The scale she used was 3 millimeters = 1 meter. What is the drawing
    6·1 answer
  • #17 please help me solve this
    8·1 answer
  • Find the value of x!!!!
    12·1 answer
  • Which statement is true about the letter D?
    6·2 answers
  • Match function with its corresponding graph
    5·1 answer
  • Ireland owes her dad $100. She plans on paying him $20 per week until it is paid off.
    10·1 answer
  • Help if you can. Thank You.
    14·1 answer
  • Assistance with trying to figure out how to solve this question.
    5·1 answer
  • A car company is trying out a new promotion where they give the customer 6 candy canes if they buy a set of four new tires. What
    13·1 answer
  • Complete the table by cubing each positive x-value.x
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!