3 years ago

HELLLLLLLLPPPPPPPPPPPP!!!!!!

Mathematics

2 answers:

stellarik [79]3 years ago

6 0

Answer:

3 bars of soap and 2 toothbrushes.

ICE Princess25 [194]3 years ago

4 0

Answer:

3 bars of soap and 2 toothbrushes.

Step-by-step explanation:

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Is -2x2y3z an expression or equation?

DochEvi [55]

Answer:

expression

Step-by-step explanation:

expressions DON'T have equal signs but equations do.

7 0

2 years ago

2 3/5 x 1 2/5=<br><br> Pls do explain it. Thanks in advance

otez555 [7]

Answer:

2×3\5×2\5=60

Step-by-step explanation:

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2 years ago

Solve for inequality.<br> 2x-3>5

nikitadnepr [17]

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2 years ago

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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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2 years ago

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