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Alex73 [517]
2 years ago
14

HELP ILL GIVE BRANILEST

Mathematics
1 answer:
alexdok [17]2 years ago
7 0

Step-by-step explanation:

when choosing a sample everyone must have an equal chance of getting picked

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Simplify [0.009÷0.004]-1/2​
pantera1 [17]

Answer:

1.75

Step-by-step explanation:

0.009÷0.004-\frac{1}{2}=

2.25-0.5=

1.75

4 0
3 years ago
Please help answer this :)
jolli1 [7]

Answer:

ok

Step-by-step explanation:

yeah

8 0
3 years ago
How old am I if 400 reduced by 2 times age is 244
zalisa [80]
440- 2x= 244 // simplify the equation given
3 0
3 years ago
How much of an alloy with 30% copper must be added to 25 pounds of a second alloy that is 20% copper to create a 27% alloy? 33.8
yuradex [85]

Answer:

58.33 lbs.

Step-by-step explanation:

There are already 25 lbs of alloy of copper

Of this 25 lbs, 20% is pure i.e. copper content = 25(0.5) = 5lbs.

Now available is

Copper      Other metals

5 lbs                20 lbs

Let x lb of 30% copper is added.

Then new alloy will have 5+0.3x lb copper in total of 25+x lbs

Percentage pure = \frac{5+0.3x}{25+x} =27%

Simplify to get

\frac{5+0.3x}{25+x} =\frac{27}{100} \\\\Cross multiply:\\27(25+x) =100(5+0.3x)\\500+30x =675 +27x\\3x = 175\\x = 175/3 = 58.33 lbs

Hence answer is 58.33 lbs should be added.



8 0
3 years ago
Read 2 more answers
A faucet leaks 75 milliliter a minute how long in 220 minutes
nordsb [41]

Answer:

16500

Step-by-step explanation:

If it leaks 75 mL a minute you multiply that by the 220. Then you get 16,500

8 0
3 years ago
Read 2 more answers
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