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Vaselesa [24]
3 years ago
15

If x = 1/4 and Y = 3/7 evaluate the following expression 7x-4y ​

Mathematics
2 answers:
tekilochka [14]3 years ago
8 0

Answer:

Step-by-step explanation:

\text{Substitute the values of x and y in the expression}

7x - 4y = 7*\dfrac{1}{4}-4*\dfrac{3}{7}

            \sf =\dfrac{7}{4}-\dfrac{12}{7}\\\\ [LCM \ of 4 \ and \ 7 = 28]\\\\ =\dfrac{7*7}{4*7}-\dfrac{12*4}{7*4}\\\\=\dfrac{49}{28}-\dfrac{48}{28}\\\\=\dfrac{1}{28}

sergiy2304 [10]3 years ago
7 0

If x = 1/4 and Y = 3/7

Evaluate the following expression: 7x - 4y

\\

\rm{7  ( \frac{1}{4}) - 4( \frac{3}{7} ) } \\

  • Substitute the given value of x and y

\rm { \orange{7 \times  \frac{1}{4} }} - 4 \times  \frac{3}{7}  \\

  • Calculate the product of the rational numbers

\rm{ \frac{7}{4}  - \orange{ 4 \times  \frac{3}{7 }} } \\

  • Calculate the product of the rational numbers

\rm \orange{ \frac{7}{4} -  \frac{12}{7}  } \\

  • Find the difference between the two fractions

= \small{\boxed{{\sf{ \frac{1}{28} }}}}

<u>Therefore, the answer is 1/28</u><u>.</u>

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