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3 years ago

Please help me with this please please please

Mathematics

2 answers:

ExtremeBDS [4]3 years ago

8 0

Answer: I think it would be 40000/160/500

Montano1993 [528]3 years ago

4 0

Answer:

Use proportion.

$\frac{40000}{160}=\frac{500}{x}$

Multiply 500 * 160 = 80000

Divide 80000/40000 = 2.

2 would represent the string length.

Hope this helps!!!

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For this case, the first thing to do is define a variable.

We have then:

x: the monetary value of that 120 square foot piece of plastic wrap

We write now the proportion that models the problem.

We have then:

$\frac {23.95} {4500} = \frac {x} {120}$

From here, we clear the value of x.

We have then:

$x = 120 (\frac {23.95} {4500})$

Calculating we have:

$x = 0,639\$$

Answer:

the monetary value of that 120 square foot piece of plastic wrap is:

$x = 0,639\$$

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Sara covers the top of a box with squares of paper that are 1 square centimeter: she uses 48 squares with 6 squares in each row.

scZoUnD [109]

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AleksandrR [38]

The solution is:

$2\frac{1}{12} - 5\frac{5}{6} = \frac{-15}{4} \text{ or } -3.75$

Solution:

We have to solve the given expression

Given expression is:

$2\frac{1}{12} - 5\frac{5}{6}$

Let us first convert the mixed fraction to improper fraction

Multiply the whole number part by the fraction's denominator.

Add that to the numerator.

Then write the result on top of the denominator.

Thus we get,

$2\frac{1}{12} = \frac{2 \times 12 + 1}{12} = \frac{25}{12}$

$5\frac{5}{6} = \frac{ 5 \times 6 +5}{6} = \frac{35}{6}$

Thus the given expression becomes,

$2\frac{1}{12} - 5\frac{5}{6} = \frac{25}{12} - \frac{35}{6}$

Make the denominators same for easier calculations

$2\frac{1}{12} - 5\frac{5}{6} = \frac{25}{12} - \frac{35 \times 2}{6 \times 2}\\\\2\frac{1}{12} - 5\frac{5}{6} = \frac{25}{12} - \frac{70}{12}\\\\2\frac{1}{12} - 5\frac{5}{6} = \frac{25-70}{12}\\\\2\frac{1}{12} - 5\frac{5}{6} =\frac{-45}{12}$

Reducing to lowest terms, we get

$2\frac{1}{12} - 5\frac{5}{6} = \frac{-15}{4}$

In decimal form, we get

$\rightarrow \frac{-15}{4} = -3.75$

Thus the solution is:

$2\frac{1}{12} - 5\frac{5}{6} = \frac{-15}{4} \text{ or } -3.75$

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