Ask question

Ask question

All categories

2 years ago

13

3. John and Nelly are cleaning their house. Nelly takes 3 hours longer than John if she cleans the house alone. If they can do t

he cleaning together in 2 hours, how long can John clean all by himself?

1 answer:

swat322 years ago

8 0

Answer:

1 hour?

Step-by-step explanation:

You might be interested in

Doy 35 puntos al que me responda esto bien pero una persona que sepa plissss

Tatiana [17]

7,8 y 10 adios amigo esa es la respuesta que necesitas

3 0

3 years ago

Read 2 more answers

Determine the indicated angle in the triangle to the nearest degree

Dmitry [639]

No image? cvccfgfyfyfcy

8 0

3 years ago

Please help fast! I have a 10 minutes :(

Neporo4naja [7]

Maybe 11x? i dont really know, thats all the info we get

3 0

2 years ago

Pleasseee hellp for brainleist answer and extra points if you correct the 2 first top rows

andrew-mc [135]

So close! But instead of adding the multiplication sign after the number you need to add them before. Good job though! :)

7 0

3 years ago

Read 2 more answers

A ferry departs from a port along the Sands River at 10:00 am. The ferry travels at a speed of 15 mph in still water and returns

jek_recluse [69]

Answer:

Speed of river's current = 5 mph

Step-by-step explanation:

Let 'd' be the distance covered

Let x be the speed of the rivers current

Speed upstream = 15-x

speed downstream = 15+x

Time = distance / speed

time upstream = $\frac{d}{15-x}$

time downstream = $\frac{d}{15+x}$

the ferry trip upstream takes twice as long as its return trip downstream

$\frac{d}{15-x}$ = $\frac{2d}{15+x}$

divide both sides by d

$\frac{1}{15-x}$ = $\frac{2}{15+x}$

cross multiply

$15+x= 2(15-x)$

$15+x= 30-2x$

Add 2x on both sideds

$15+3x= 30$

subtract 15 from both sides and divide by 3

$3x=15$

x=5

Speed of river's current = 5 mph

8 0

3 years ago