3

Mathematics

1 answer:

S_A_V [24]3 years ago

6 0

Answer:is there a picture that I can see to help me better answer the question

Step-by-step explanation:

You might be interested in

Two persons work together at the local aquarium. It takes the first person 120 minutes to clean the jellyfish tanks. Since the s

matrenka [14]

Answer:

168 minutes

Step-by-step explanation:

It takes 120 minutes for the first person to clean the jellyfish tank.

This means that in 1 minute the first person cleans $\frac{1}{120}$ of the tank.

Let the time taken by the second person working alone to clean the tank be x minutes.

Then in 1 minute the second person cleans $\frac{1}{x}$ of the tank.

Working together, the two persons clean,

$\frac{1}{120} + \frac{1}{x}$ of the tank

But it is given that the two persons working together can clean the tank in 70 minutes. This means that in 1 minute both of them can clean $\frac{1}{70}$ of the tank.

Expressing in equation form:

$\frac{1}{120} + \frac{1}{x} = \frac{1}{70}$

$=> \frac{1}{x} = \frac{1}{70} - \frac{1}{120}$

$=> \frac{1}{x} = \frac{12-7}{840}$

$=> \frac{1}{x} = \frac{5}{840}$

$=> \frac{1}{x} = \frac{1}{168}$

$=> x = 168$

This means that the second person can clean the tank in 168 minutes.

7 0

3 years ago

An ordered pair is written as:

faust18 [17]

An ordered pair is written as (x, y).

For example:

(4, 5)
(8, 10)
(10293102398102398, 234587204398769035287)
(zebra, giraffe)
(brainly, openstudy)

3 0

4 years ago

Read 2 more answers

Which expression is equivalent to -1/2 (2-2x) +3<br><br> PLEASSEE AANNSSWWEEER

dimaraw [331]

Answer: Look at image below

Step-by-step explanation:

oop sksks