2 years ago

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

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3 years ago

Please help answer this :)

jolli1 [7]

Answer:

Step-by-step explanation:

yeah

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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

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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.

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3 years ago

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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

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3 years ago

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