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padilas [110]
2 years ago
8

NEED HELP ASAP. I don not understand why I'm wrong. What is the right answer???

Mathematics
2 answers:
galina1969 [7]2 years ago
8 0

\huge \boxed{\mathfrak{Question} \downarrow}

  • Simplify \huge \sf\frac { \frac { 3 } { 4 } - \frac { 5 } { 2 } } { \frac { 3 } { 5 } - \frac { 3 } { 2 } } \\

\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}

\huge \sf\frac { \frac { 3 } { 4 } - \frac { 5 } { 2 } } { \frac { 3 } { 5 } - \frac { 3 } { 2 } } \\

  • The least common multiple of 4 and 2 is 4. Convert \sf\frac{3}{4}and \sf\frac{5}{2}to fractions with denominator 4.

\huge \sf \frac{\frac{3}{4}-\frac{10}{4}}{\frac{3}{5}-\frac{3}{2}}  \\

  • Because \sf\frac{3}{4}and \sf \frac{10}{4} have the same denominator, subtract them by subtracting their numerators.

\huge \sf\frac{\frac{3-10}{4}}{\frac{3}{5}-\frac{3}{2}}  \\

  • Subtract 10 from 3 to get -7.

\huge \sf\frac{-\frac{7}{4}}{\frac{3}{5}-\frac{3}{2}}  \\

  • The least common multiple of 5 and 2 is 10. Convert \sf\frac{3}{5} and \sf \frac{3}{2} to fractions with denominator 10.

\huge \sf\frac{-\frac{7}{4}}{\frac{6}{10}-\frac{15}{10}}  \\

  • Because \sf \frac{6}{10} and \sf \frac{15}{10} have the same denominator, subtract them by subtracting their numerators.

\huge \sf\frac{-\frac{7}{4}}{\frac{6-15}{10}}  \\

  • Subtract 15 from 6 to get -9.

\huge \sf\frac{-\frac{7}{4}}{-\frac{9}{10}}  \\

  • Divide \sf-\frac{7}{4} by \sf-\frac{9}{10} by multiplying \sf-\frac{7}{4} by the reciprocal of \sf-\frac{9}{10}.

\huge \sf-\frac{7}{4}\left(-\frac{10}{9}\right)

  • Multiply \sf-\frac{7}{4} by \sf-\frac{10}{9} by multiplying the numerator by the numerator and the denominator by the denominator.

\huge \sf\frac{-7\left(-10\right)}{4\times 9}

  • Carry out the multiplications in the fraction \sf\frac{-7\left(-10\right)}{4\times 9}.

\huge \sf\frac{70}{36}

  • Reduce the fraction \sf\frac{70}{36} to its lowest terms by extracting and cancelling out 2.

\huge \boxed{ \bf\frac{35}{18}\approx 1.944..}

hammer [34]2 years ago
6 0

Answer:

<u>Answer</u><u>:</u><u> </u><u>3</u><u>5</u><u>/</u><u>1</u><u>8</u>

Step-by-step explanation:

\frac{ \{ \frac{3}{4} -  \frac{5}{2}  \} }{ \{ \frac{3}{5}  -  \frac{3}{2}  \}}   =  \frac{( -  \frac{7}{4} )}{ (-  \frac{9}{10} )}  \\  \\   =  \frac{7}{4}  \div  \frac{9}{10}

use the reciprocal of 9/10 :

=  \frac{7}{4}  \times  \frac{10}{9}  \\  \\  =  \frac{35}{18}

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In an ore, 9.8% of its total weight is metal. How many pounds of metal are in 1,950 lb of ore?
Fudgin [204]

Answer

Find out the  how many pounds of metal are in 1,950 lb of ore .

To proof

let us assume that the pounds of metal are in 1,950 lb of ore be x .

As given

In an ore, 9.8% of its total weight is metal.

ore weight = 1,950 lb

9.8% is written in the decimal form

= \frac{9.8}{100}

= 0.098

Than the equation becomes

x = 0.098 × 1950

x = 191.1 pounds

Therefore the 191.1 pounds of metal are in 1,950 lb of ore .

Hence proved



5 0
3 years ago
Help needed! no links please, they're annoying.
denis23 [38]
The area of a rectangle is length*width.

The length of this 3x and the width is 2x-3. This means that, to find the area, you need to multiply 3x and 2x-3.

Start by writing out this equation:
A=l*w

Then, plug in your given values:
A= 3x*2x-3 (you can also write it as A= 3*x*2*x-3)

Then, following the order of operations, you start by multiplying. This makes your equation become A = 6x^2 -3. (^2 means squared). It turns into this because 3 * 2 is 6 and x * x is x^2 and you still haven’t used the 3 yet.

After this, there is nothing more that you can do to simplify the equation. Therefore, the area is 6x^2 - 3.

I hope this helped!
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Anastaziya [24]
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3 years ago
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Crazy boy [7]

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now simplify

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to the nearest hundredth

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8 0
3 years ago
Read 2 more answers
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