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3 years ago

What is 5/2 - blank = 1/3

Mathematics

1 answer:

sdas [7]3 years ago

7 0

Step-by-step explanation:

taking that blank as x

5/2 -x = 1/3

the x will go to the right hand side of the equation which then would make it positive ( making x the subject) and 1/3 will come to the left hand side of the equation becoming -1/3

so the equation will become 5/2-1/3=x

solving the fraction then gives 13/6 or 2.17 as the value of x

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Write 45/30 in simplest form

RideAnS [48]

Answer:

1 1/2

Step-by-step explanation:

SO first convert into mixed

1 15/30

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3 years ago

jessica will babysit children for $8 an hour. ciara will babysit for an appointment fee of $12 and $4 an hour. how many hours wo

SSSSS [86.1K]

Answer:

Answer are in bold below

Step-by-step explanation:

Question: 1

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Now we times both values.

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Question 2:

$8 x 5 = $40

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3 years ago

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Answer:

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3 years ago

What fraction is equal to 50% of 1/3

Dima020 [189]

Answer:

1/6

Step-by-step explanation:

50% is 0.5 or 1/2 so you just multiply 1/3 by 1/2 to get 1/6

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3 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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