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
denis-greek [22]
3 years ago
14

A technician charges $25 per hour plus $50

Mathematics
1 answer:
solmaris [256]3 years ago
7 0
Use a variable to represent the number of hours the technician will work, plus the $50.

50+25x
This would be the expression used to find the amount of money the technician needs.
You might be interested in
PLS HELP MEE , WILL MARKTHE BRAINLIEST PLS
Sunny_sXe [5.5K]

Step-by-step explanation:

hopefully it is visible and makes sense

:)

8 0
2 years ago
Refer to the following scenario:You want to see if there is a difference between the exercise habits of Science majors and Math
bekas [8.4K]

Answer:

1. H0: P1 = P2

2. Ha: P1 ≠ P2

3. pooled proportion p = 0.542

4. P-value = 0.0171

5. The null hypothesis failed to be rejected.

At a signficance level of 0.01, there is not enough evidence to support the claim that there is significant difference between the exercise habits of Science majors and Math majors .

6. The 99% confidence interval for the difference between proportions is (-0.012, 0.335).

Step-by-step explanation:

We should perform a hypothesis test on the difference of proportions.

As we want to test if there is significant difference, the hypothesis are:

Null hypothesis: there is no significant difference between the proportions (p1-p2 = 0).

Alternative hypothesis: there is significant difference between the proportions (p1-p2 ≠ 0).

The sample 1 (science), of size n1=135 has a proportion of p1=0.607.

p_1=X_1/n_1=82/135=0.607

The sample 2 (math), of size n2=92 has a proportion of p2=0.446.

p_2=X_2/n_2=41/92=0.446

The difference between proportions is (p1-p2)=0.162.

p_d=p_1-p_2=0.607-0.446=0.162

The pooled proportion, needed to calculate the standard error, is:

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{82+41}{135+92}=\dfrac{123}{227}=0.542

The estimated standard error of the difference between means is computed using the formula:

s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.542*0.458}{135}+\dfrac{0.542*0.458}{92}}\\\\\\s_{p1-p2}=\sqrt{0.001839+0.002698}=\sqrt{0.004537}=0.067

Then, we can calculate the z-statistic as:

z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{0.162-0}{0.067}=\dfrac{0.162}{0.067}=2.4014

This test is a two-tailed test, so the P-value for this test is calculated as (using a z-table):

\text{P-value}=2\cdot P(z>2.4014)=0.0171

As the P-value (0.0171) is bigger than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

At a signficance level of 0.01, there is not enough evidence to support the claim that there is significant difference between the exercise habits of Science majors and Math majors .

We want to calculate the bounds of a 99% confidence interval of the difference between proportions.

For a 99% CI, the critical value for z is z=2.576.

The margin of error is:

MOE=z \cdot s_{p1-p2}=2.576\cdot 0.067=0.1735

Then, the lower and upper bounds of the confidence interval are:

LL=(p_1-p_2)-z\cdot s_{p1-p2} = 0.162-0.1735=-0.012\\\\UL=(p_1-p_2)+z\cdot s_{p1-p2}= 0.162+0.1735=0.335

The 99% confidence interval for the difference between proportions is (-0.012, 0.335).

6 0
3 years ago
Amari arranged 9 photos on a bulletin board. He put the photos in rows. Each row contains the same number of photos. How many ph
Effectus [21]
There would be three photos in each row
6 0
3 years ago
Multiple (2 4/5) (-5 2/3)
katovenus [111]

Answer:

15 13/5 hopefully it helps

8 0
3 years ago
What are the coefficients in the expression -8y(2nd power) + 12x +5 +7?
oee [108]
It is choice B 

i hope that helps
7 0
3 years ago
Read 2 more answers
Other questions:
  • The probability that Aaron will get a hit at his next time is 0.175. Which statement best describes his probability. A. Likely.
    6·2 answers
  • Let the polynomials A = 7x² + 3xy and B = -3xy .
    12·1 answer
  • Mary sells fruit with four of her friends. If the earnings are divided evenly, how
    9·1 answer
  • Don has a bag that weighs 2 oz, and Jamie has a bag that weighs 1 oz. Don put some marbles in his bag each weighing 9.4 oz, and
    8·1 answer
  • 3. I opened a compound interest account with $300 at 2%. How much money will be in the
    8·2 answers
  • PLEASE HELP QUICKLY!!!
    5·1 answer
  • Plz plz plz plz help me plz it is due in 1 hour and no links plz​
    9·1 answer
  • Please show your work !!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!
    5·2 answers
  • Find the product of $$12\times5$$​
    8·2 answers
  • Can someone help me please
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!