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
Veronika [31]
3 years ago
9

It takes leon 13 hours to seal his driveway working by hinself. If michael helps leon, they can seal the driveway in 7 hours. Ho

w long would it take michael to seal yhe drive way alone?
Mathematics
1 answer:
Monica [59]3 years ago
4 0

Answer:

15.1667 hours (15 hours and 10 minutes)

Step-by-step explanation:

Using the concept of "distance = speed * time", we can formulate equations to solve this problem.

Let's call Leon's speed X, Michael's speed Y and the length of the driveway D.

If leon takes 13 hours alone, we can write the equation:

D = X * 13

If Michael helps Leon, we have this equation:

D = (X+Y) * 7

(The total speed is the sum of their speed, as they are working together)

Making the first equation equate the second, we have:

13*X = 7*X + 7*Y

7*Y = 6*X

X = (7/6)*Y

If we use this value of X in the first equation, we have:

D = 13*X = 13*(7/6)*Y = 15.1667*Y

So we have that Michael would take 15.1667 hours (15 hours and 10 minutes) to seal the driveway alone.

You might be interested in
HELP!! Which truck pulled 2,000 pounds at the average<br> speed of 2 yards per minute?
Advocard [28]
The correct answer it would be B

Ford
8 0
3 years ago
This is the angle similarity of triangles btw. I will give brainliest to whoever finds the missing angle measures.
Basile [38]
1: 64
2: 59
3: 49
A triangle should always add up to 180 degrees. So just add up the angles you have and subtract them from 180
8 0
2 years ago
Read 2 more answers
Factor the trinomial<br> 10x^2+11X-6
yan [13]

Answer:

Not factorable with rationable numbers

Step-by-step explanation:

You cannot factor this expression with rationable numbers.

6 0
2 years ago
Read 2 more answers
What is equivalent to 5^3 ( Choose all that apply)
Tema [17]

Answer:

A, and D

Step-by-step explanation:

A works because when you multiply like bases, you add exponents, so we have...

  5^7*5^-4 = 5^(7+(-4)) = 5^(7 -4) = 5^3

B  doesn't work because when you divide like bases, you subtract the exponent of the denominator from the exponent of the denominator...

  5^12/5^4 = 5^(12 - 4) = 5^8

C doesn't work because there is addition.  

 5 + 5² = 5 + 25 = 30, and 5³ = 125

D works because 5^0 = 1, so we have

  5^0(5^3) = 1(5^3) = 5^3

E doesn't work because there is subtraction...

  5^3 - 5^0 = 5^3 - 1 = 124

8 0
3 years ago
A rectangular garden is fenced on three sides with a wall forming the fourth
Sveta_85 [38]

Answer:

The dimensions are 5 m by 20 m.

Step-by-step explanation:

The area = length * width = 100 m^2.

2 times the width +  the length = 30 m.

So we have the equations:

wL = 100

2w + L = 30

From the first equation:

L = 100/w so substituting in the second equation, we have:

2w + 100/w = 30

Multiply through by w:

2w^2 + 100 = 30w

2w^2 - 30w + 100 = 0   Divide by 2:

w^2 - 15w + 50 = 0

(w - 5)(w - 10) =

w = 5 or 10m.

So L =  100/5 or 100/10

= 20 or 10.

As it is rectangular then w = 5 and L = 20.

4 0
3 years ago
Other questions:
  • HOW WOULD I SOLVE THIS? WITH WHAT FORMULA AND WHAT IS THE ANSWER
    7·1 answer
  • Anyone Great at math? Here you go!
    9·1 answer
  • Please help I will mark brainliest if correct.
    11·2 answers
  • What is the equation of the circle with center (–2, 5) that passes through the point (–3, 8)?
    10·1 answer
  • PLZ HELP ASAP! WILL MARK BRAINLIEST!!
    5·1 answer
  • Becka can make a bracelet in 2 minutes.
    10·1 answer
  • Someone plz help me with this??????????!!!!!!!!!!
    6·1 answer
  • What is the slope of y=-5x+8
    6·2 answers
  • The formula for simple interest is
    11·1 answer
  • Pohgxeicucorcbuebcoeubceubcougcurevci2cvirvcucbkbc3rvrvr3vvvrvrvvvvv
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!