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
Afina-wow [57]
2 years ago
13

It takes you 8 hours to dig a hole. It would take you and your brother 5 hours to dig that same hile together. If your brother w

as to dig the hole by himself it would take him how many hours?
Mathematics
2 answers:
inn [45]2 years ago
6 0

Answer:

I think if it takes me 8 hours then it will surely take him 8 hours

DerKrebs [107]2 years ago
4 0

Answer:

40/3 hrs = 13.3 hrs

Step-by-step explanation:

Let me = K , my brother = P

K digs a hole in 8 hrs

K in 1 hr digs 1/8 of a hole

K + P dig a hole in 5 hrs

K + P in 1 hr dig 1/5

Let the portion of the hole Plan digs in 1 hr be x

1/8 + x = 1/5

x = 3/40

3/40 of the hole is dug by P in 1 hr

1 of the hole is dug by P in 40/3 hrs

= 40/3 hrs

=13.3 hrs

You might be interested in
How to solve and what is the answer
TiliK225 [7]
Two ways: 
1) guess factors(trial and error)
2) use quadratic formula.
If you use this method then a = -3, b = -6 and c = -1


x = -b +/- [sqrt(b^2 -4ac)/2a]
substituting a, b, and c into our equation we get:
x = - (-6)+/- [sqrt ((-6)^2) - 4(-3)(-1))/2 (-3)]
x = + 6 +/- [sqrt (36 -4 (3)/-6)]  if I didnt make a mistake in my signs
x = + 6 +/- [sqrt (36 -12)/-6)]
x = 6 +/- [sqrt (24)/-6]  but sqrt 6 x sqrt of 4 = sqrt 24 hence
x = 6 +/-  [ sqrt 6 x sqrt 4 /-6] that is:
x = 6 +/- [sqrt 6 x 2 /-6 ]
so x = 6 + [sqrt 6 x 2/-6] and x = 6 - [sqrt 6 x 2/-6]

7 0
3 years ago
Find a of this angle.
Mice21 [21]

In a triangle, the total angle is 180 degrees. A straight line is always 180 degrees. With this in mind, the following can be obtained:

a + 2x + {57}^{o}   =  {180}^{o}  \\ 5x + a =  {180}^{o}

These are simultaneous equations.

a + 2x +  {57}^{o}  = 5x + a \\ 3x =  {57}^{o}  \\ x =  {19}^{o}  \\ 5x + a =  {180}^{o} \\ 5( {19}^{o}  ) + a =  {180}^{o}  \\ a =  {85}^{o}

6 0
3 years ago
Read 2 more answers
Select the correct answer.
Rashid [163]

Answer: D. (4,3)

The x coordinates of A and B are 9 and -1 in that order. Add them up to get 9+(-1) = 9-1 = 8. Then divide by two to end up with 8/2 = 4. The midpoint has an x coordinate of 4.

Repeat for the y coordinates. Add them up: 8+(-2) = 8-2 = 6. Then divide by two: 6/2 = 3. The midpoint has an y coordinate of 3.

Those two coordinates pair up to get (x,y) = (4,3) which is the midpoint of segment AB.

7 0
3 years ago
A window washer cleaned 38 windows in 2 hours. At this rate, how many windows did he clean in 7 hours? Help before I pass out tr
shutvik [7]

Answer: 133 windows


Step-by-step explanation:

Step 1: 38/2=19

Step 2: 19*7=133


4 0
2 years ago
Read 2 more answers
The set of ordered pairs represented by the graph below can be described as which of the following
Aneli [31]

ANSWER

a relation only

EXPLANATION

The given graph shown in the attachment represents only a relation and not a function.

The reason is that, a vertical line drawn across this graph will intersect this graph at more than one point.

Since the graph fails to pass the vertical line test, the ordered pair represented by this graph represents a relation only.

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is 20% of 140 ??????????????
    14·2 answers
  • Evaluate the expression when a=2 and x= -3
    13·1 answer
  • NEED HELP RN PLZ!!!!!!!!!!!!!!!!!!!!!Complete the square to find the zeros of y=x^2+12x-5?
    8·1 answer
  • Suppose a simple random sample of size n=1000 is obtained from a population whose size is Nequals=1,000,000 and whose population
    14·1 answer
  • Whats 2.48 divided by 0.4?
    14·1 answer
  • A graduated cylinder is filled with 36 cm 3 of liquid the liquid is poured into a different cylinder that has a radius of 3cm ,
    5·1 answer
  • Ray is planning to open a video game store. He has developed the following expense breakdown for set-up and operation for the fi
    11·1 answer
  • What is the value of B and C
    5·1 answer
  • F(x) = 8 – 3x<br>Evaluate f(9)​
    12·1 answer
  • How many pizzas can Naylah make with 1/5 of a block of cheese
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!