A copy machine can copy a report in 30 mins. When a second copy machine is used at the same time, the copying can be sone in 18 min. How long would it take the second copu machine to do the copying alone?

i have:

x=30

x+y=18

that would be -12..not right?

4 0

2 years ago

Select all the graphs that are proportional.help me please

Vaselesa [24]

Maybe u should study i know its hard but try ur best :)

8 0

2 years ago

Read 2 more answers

The rabbit population in a certain area is 500% of last years population. There are 900 rabbits this year. How many were there t

12345 [234]

Answer:

180 rabbits

Step-by-step explanation:

<u><em>The correct question is</em></u>

The rabbit population in a certain area is 500% of last years population. There are 900 rabbits this year. How many were there last year?

we know that

900 rabbits represent 500% of last year population

Last year population represent 100%

using proportion

Find out how many rabbits represent a percentage of 100%

$\frac{900}{500\%}=\frac{x}{100\%}\\\\x=900(100)/500\\\\x=180\ rabbits$

7 0

2 years ago