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
Degger [83]
3 years ago
9

A painter estimates she can paint a house in 40 hours. She knows her assistant can do the same job is 60 hours. How long would i

t take them to paint the house working together?
Mathematics
1 answer:
aleksley [76]3 years ago
6 0

24 hours

Step-by-step explanation:

1 hour

Painter1 1/40

Painter2 1/60

together 1/40+1/60=5/120=1/24

You might be interested in
Need some help with this one
Gemiola [76]
Convert all numbers into fractions:
-29/6
-31/9
Find a common denominator
-87/18
-62/18
Perform the operation
-149/18
7 0
3 years ago
A carousel has 30 cars. Determine the angle of rotation that maps #6 to car #19.
ivolga24 [154]

Answer:  The answer is 260°.


Step-by-step explanation: Given that a Carousel has 30 cars. We need to find the angle of rotation which maps car no. 6 to car no. 19.

Now, the Carousel will make a regular polygon with 30 sides and each car as a vertex.

So, angle of symmetry for the polygon is

\theta=\dfrac{360^\circ}{30}=20^\circ.

Number of sides from car 6 to car 19 = 19 - 6 = 13.

Therefore, the angle of rotation that maps car 6 to car 19 is given by

\alpha=13\times \theta=13\times 20^\circ=260^\circ.

Thus, the required angle of rotation is 260^\circ.


7 0
3 years ago
Geoff wants to make a 200 ml of 6% alcohol solution mixing a quantity of a 3% alcohol solution with a 8% alcohol solution. What
Marina86 [1]

Answer:

Volume of 3% alcohol = 80 ml

Volume of 8% alcohol = 120 ml

Step-by-step explanation:

Final volume of 6% alcohol solution = 200 ml

Let the volume of 3% alcohol volume = a ml

Therefore, volume of 8% alcohol = (200 - a) ml

Equation for the given situation will be,

3a + 8(200 - a) = 6×200

3a + 1600 - 8a = 1200

1600 - 5a = 1200

5a = 400

a = 80 ml

Therefore, volume of 3% alcohol to be used = 80 ml

And volume of 8% alcohol to be used = (200 - 80) = 120 ml

8 0
3 years ago
HURRY PLEASE I BARELY HAVE ANY TIME<br>what is the solution to the system of equations?​
DanielleElmas [232]

Answer:

maybe 3...............................

7 0
3 years ago
Number 49....I need help
sergiy2304 [10]
Now, keep in mind that, we'll be using 25mile intervals, notice, that at a cost of 200 bucks, it went for 50 miles, now the charges are just for every 25miles only, so, if you drive 30 miles, you pay for 25miles and if you drive for 49 miles, you still only pay for 25 miles, but because 50/25 is 2 intervals, then if you drive for 50 miles, you're paying for 2 intervals of 25miles, not just one.

now, also let's keep in mind that, when the car was driven for 200 miles, that's 200/25 or 8 25mile intervals, so the 25mile charge kicked in 8 times.

\bf \stackrel{cost}{y}=\stackrel{fixed~charge}{F}+\stackrel{25mile~intervals}{m}\quad \stackrel{25mile~charge}{x}\implies y=F+mx\\\\&#10;-------------------------------\\\\&#10;\begin{cases}&#10;200=F+2x\implies 200-2x=\boxed{F}\\&#10;245=F+8x\\&#10;----------\\&#10;245=\boxed{200-2x}+8x&#10;\end{cases}&#10;\\\\\\&#10;45=6x\implies \cfrac{45}{6}=x\implies \cfrac{15}{2}=x\impliedby &#10;\begin{array}{llll}&#10;\textit{so the 25mile charge is}\\&#10;\textit{7 bucks and 50cents}&#10;\end{array}&#10;\\\\\\&#10;

\bf 200=F+2\left( \frac{15}{2} \right)\implies 200=F+15\implies 185=F&#10;\\\\\\&#10;\textit{and the \underline{fixed charge} is 185 bucks then, let's check for 450}&#10;\\\\\\&#10;\boxed{y=185+\frac{15}{2}x}\qquad &#10;\begin{cases}&#10;450~miles\\\\&#10;\cfrac{450}{25}\implies 18~\textit{\underline{25mile intervals}}\\\\&#10;x=18&#10;\end{cases}&#10;\\\\\\&#10;y=185+\cfrac{15}{2}\cdot 18\implies y=185+135\implies y=320
7 0
3 years ago
Other questions:
  • Is the following definition of obtuse angles reversible? If yes, write it as a true biconditional.
    8·1 answer
  • In the diagram, the areas of ΔADC and ΔDCB are in a ratio of 3 : 4. What are the coordinates of point C?
    10·2 answers
  • Angle A is in standard position and terminates in quadrant IV. If sec(A) = 4/3 , complete the steps to find cot(A).  Use the ide
    8·2 answers
  • PLEASE ANSWER FAST!!!
    14·1 answer
  • An individual’s irresponsibility may affect the community. true or false?
    9·1 answer
  • Question 5 on the attachment
    15·1 answer
  • Answer a and b. Help!!!!
    11·1 answer
  • Help please, thank you
    9·2 answers
  • HOW MANY TRANGLE ARE THERE​
    11·2 answers
  • Is x=2 a solution? <br> 1. -2(x-4)=4<br> 2. 26/x=13<br> 3. 4(x-1)-3(x-2)=-08
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!