Question

only question viii

please help​

Answer 1

Step-by-step explanation:

the sum is a rational no.

$\underline\color{green}{plzzz\:mark\: brainliest}$

Answer 2

Question

$\dfrac{7}{-18}\:and\:\dfrac{8}{27}$

Solution

$-\dfrac{7}{18}+\dfrac{8}{27}$

Now we have to find the LCM of 18 and 27

$\begin{array} {r | 1} 2 & 18,27 \\ \cline{2-2} 3 & 9,27 \\ \cline{2-2} 3 & 3,9 \\ \cline{2-2} 3 & 1,3 \\ \cline{2-2} &1,1\end{array}$

LCM of 18 and 27 = 2 × 3 × 3 × 3 = 54

According to the question

$-\dfrac{7}{18}+\dfrac{8}{27}\\\\\\LCM=54\\\\\\\dfrac{-21+16}{54}\\\\\\=\boxed{\bold{\dfrac{-5}{54}\:answer}}$

Rational Number - The number which can be expressed in the form of $\dfrac{p}{q}$ is called rational number.

$\dfrac{-5}{54}$ is in the form of $\dfrac{p}{q}$ so it is rational number.