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
exis [7]
3 years ago
8

paul earns 25.50 for every lawn he mows. this week he moved L lawns. he spends 3.50 per lawn on gasoline. write an expression to

describe his earning and spending, where L is the number of lawns mowed?
Mathematics
1 answer:
notsponge [240]3 years ago
3 0
If Paul mows the lawn once, he earns 1*25.50.  If he mows it twice, he earns 2*25.50, and so on.  So, he earns L*25.50.  But, he spends 3.50.  So the equation is:

L*25.50-3.50
You might be interested in
The resting heart rate of 60 patients is shown in the frequency table below.
Murrr4er [49]

The standard deviation is 9.27. The typical heart rate for the data set varies from the mean by an average of 9.27 beats per minute.

<h3>How to determine the standard deviation of the data set?</h3>

The dataset is given as:

Heart Rate  Frequency

60 1

65 3

70 4

75 12

80 8

85 15

90 9

95 5

100 3

Calculate the mean using

Mean = Sum/Count

So, we have

Mean = (60 * 1 + 65 * 3 + 70 * 4 + 75 * 12 +  80 * 8 +  85 * 15 +  90 * 9 +  95 * 5 + 100 * 3)/(1 + 3 + 4 + 12 + 8 + 15 + 9 + 5 + 3)

Evaluate

Mean = 82.25

The standard deviation is

\sigma = \sqrt{\frac{\sum f(x - \bar x)^2}{\sum f -1}}

So, we have:

SD = √[1 * (60 - 82.25)^2 + 3 * (65 - 82.25)^2 + 4 * (70 - 82.25)^2 + 12 * (75 - 82.25)^2 + 8 * (80 - 82.25)^2 +  15 * (85 - 82.25)^2 +  9 * (90  - 82.25)^2 + 5 * (95 - 82.25)^2 + 3 * (100 - 82.25)^2)]/[(1 + 3 + 4 + 12 + 8 + 15 + 9 + 5 + 3 - 1)]

This gives

SD = √85.9533898305

Evaluate

SD = 9.27

Hence. the standard deviation is 9.27. The typical heart rate for the data set varies from the mean by an average of 9.27 beats per minute.

Read more about standard deviation at:

brainly.com/question/4079902

#SPJ1

5 0
2 years ago
The surface area of the three-dimensional figure is square centimeters?
Zina [86]

Answer:

Step-by-step explanation:

Alright, lets get started.

The surface area of the figure given is : The area of all shapes together

The figure has 2 similar triangles and 3 similar rectangles.

The area of 1 triangle =

\frac{1}{2}*base*height

The area of 1 triangle = \frac{1}{2}*10*8.66=43.3

So, the area of both triangles = 43.3*2=86.6

The area of 1 rectangle = width *length

The of 1 rectangle = 10*15=150

So, the area of all 3 rectangles = 3*150=450

So, total area of figure = 86.6+450=536.6

hence the surface area is 536.6 square centimeters : Answer

Hope it will help :)

3 0
3 years ago
Is 56/72 and 7/9 proportional
Andreas93 [3]

Answer:

Yes. They are proportional.

Step-by-step explanation:

\frac{56}{72} =\frac{7}{9}

0.777=0.777

The left side 0.777 is equal to the right side 0.777, which means that the given statement is always true.

True

4 0
2 years ago
Plz help mee
Semmy [17]
The answer to this is D
5 0
3 years ago
Question 19 please help
vfiekz [6]
√105
if u see its factor are only 3,5,7 so it cant be simplify
answer should be √105
B
4 0
3 years ago
Other questions:
  • The graph of a polynomial is shown below. Between which two x-values does this polynomial have an extreme value?
    13·1 answer
  • MORE PROBABILITY :\ . In a family with family with 4 children, excluding multiple births, what is the probability of having 2 gi
    10·1 answer
  • 100 is 10 times as much as
    6·1 answer
  • The score of golfers for a particular course follows a normal distribution that has a mean of 73 and a standard deviation of 3.
    8·1 answer
  • Use sigma notation to represent the following series for 8 terms.
    9·2 answers
  • DUE TOMORROW GIVING BRAINLIEST!
    11·2 answers
  • Find the compliment of an angle whose supplement is 115 degrees.
    7·1 answer
  • Write an equation of the line from the table
    9·1 answer
  • A. There are 34 musicians included in the data.
    11·1 answer
  • PLEASE HELP WILL GIVE BRAINLIEST: find the parabola y=x^2+7x+35/4
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!