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
kirill [66]
3 years ago
10

PLEASE HELP! I NEED THIS IN ORDER TO GRADUATE TOMORROW!!!

Mathematics
2 answers:
lara31 [8.8K]3 years ago
7 0
For the 1st hour the cost is $50 whatever is the duration (providing it's 1 hour max.

From one hour and onward the cost becomes an additional $25 per quater of an hour.

If y is the cost and x the number of hours, then the equation becomes :

y =50 + 0.25.x or y =1/4x + 50
Mashutka [201]3 years ago
4 0

Answer: A


Step-by-step explanation:

Which statement describes the relationship between labor cost and time for a car repair?

All repairs requiring 1 hour or less have the same labor cost.

Labor costs the same no matter how many hours are used for a repair.

Labor costs for a repair are more expensive as the number of hours increases.

There is no cost of labor for a repair requiring less than 1 hour.

You might be interested in
Sonja Koch has 90,000. She paid 350 for the title background check, 400$ for the title insurance
Pavlova-9 [17]

Answer:

89250

Step-by-step explanation:

90,000 - 350 = 89,650 - 400 = 89,250

taa-daa

3 0
3 years ago
The following table shows the percent increase of donations made on behalf of a non-profit organization for the period of 1984 t
pashok25 [27]
Giving the table below which shows <span>the percent increase of donations made on behalf of a non-profit organization for the period of 1984 to 2003.
</span>
Year:        1984     1989     1993     1997     2001     2003

Percent:    7.8       16.3       26.2      38.9     49.2      62.1

The scatter plot of the data is attached with the x-axis representing the number of years after 1980 and the y-axis representing the percent increase <span>of donations made on behalf of a non-profit organization.

To find the equation for the line of regression where </span><span>the x-axis representing the number of years after 1980 and the y-axis representing the percent increase of donations made on behalf of a non-profit organization.
\begin{center}&#10;\begin{tabular}{ c| c| c| c| }&#10; x & y & x^2 & xy \\ [1ex] &#10; 4 & 7.8 & 16 & 31.2 \\  &#10; 9 & 16.3 & 81 & 146.7 \\ &#10;13 & 26.2 & 169 & 340.6 \\ &#10;17 & 38.9 & 289 & 661.3 \\ &#10;21 & 49.2 & 441 & 1,033.2 \\ &#10;23 & 62.1 & 529 & 1,428.3 \\ [1ex]&#10;\Sigma x=87 & \Sigma y=200.5 & \Sigma x^2=1,525 & \Sigma xy=3,641.3  &#10;\end{tabular}&#10;\end{center}
</span>
Recall that the equation of the regression line is given by
y=a+bx
where
a= \frac{(\Sigma y)(\Sigma x^2)-(\Sigma x)(\Sigma xy)}{n(\Sigma x^2)-(\Sigma x)^2} = \frac{200.5(1,525)-87(3,641.3)}{6(1,525)-(87)^2}  \\  \\ = \frac{305,762.5-316793.1}{9,150-7,569} = \frac{-11,030.6}{1,581} =-6.977
and
b= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{n(\Sigma x^2)-(\Sigma x)^2} = \frac{6(3,641.3)-(87)(200.5)}{6(1,525)-(87)^2}  \\  \\ = \frac{21,847.8-17,443.5}{9,150-7,569} = \frac{4,404.3}{1,581} =2.7858

Thus, the equation of the regresson line is given by
y=-6.977+2.7858x

The graph of the regression line is attached.

Using the equation, we can predict the percent donated in the year 2015. Recall that 2015 is 35 years after 1980. Thus x = 35.

The percent donated in the year 2015 is given by
-6.977+2.7858(35)=-6.977+97.503=90.526

Therefore, the percent donated in the year 2015 is predicted to be 90.5

7 0
3 years ago
42×4/7 how do this problem
vlada-n [284]
Convert to:

42        4         168
----  x  ----  =   ------
 1         7           7
5 0
3 years ago
Will mark brainliest
Ksenya-84 [330]

Answer:

Plan A

Step-by-step explanation:

Plan A costs 62.5

Plan B costs 65

Please help me by marking me brainliest. I'm one away :)

7 0
3 years ago
there are approximately 3 million births in the unitad states each year .find the birth rate per minute
juin [17]

Answer:

Approx. 6 b/m

Step-by-step explanation:

Find out How many minutes in a year which is 525600 then divide that by 3,000,000 which makes 5.7077 so rounded is 6.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Jill and Erika made 4 gallons of lemonade for their lemonade stand. How many quarts did they make?
    9·2 answers
  • The function f(t)=-16t^2 +10 models the height (in feet) of an object t seconds after it is dropped from a height of 10 feet on
    10·1 answer
  • Which of the following expressions would simplify to be the multiplicative identity?
    9·1 answer
  • $2,200 people enter an amusement park every hour. How long will it take for 6,600 people to enter the park ?
    9·2 answers
  • Suppose you start at the orgion, move along the x-axis distance of 4 units in the positive direction, and then move downword a d
    13·1 answer
  • Which equation is represented by the graph below?
    6·1 answer
  • I need people to talk to please
    12·1 answer
  • Can someone please help me with this?
    7·1 answer
  • Whats 6 divided by 24 (show work)
    8·1 answer
  • Miss Curtis picked 18 apples she bake 2/3 of them into a pie the apples are represented below how many apples did she bake into
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!