Question

the product of three rational number is -7/18 if two of them are 3/9 and -1/5 find the third number

Answer 1

Answer:

3/5 = (3 × 2)/(5 × 2) = 6/10, (3 × 3)/(5 × 3) = 9/15 and (3 × 4)/(5 × 4) = 12/20

Hence, 6/10, 9/15 and 12/20 are rational numbers equivalent to the given rational number 3/5.

Answer 2

Answer:

Third number is 35/6

Step-by-step explanation:

Let the third number be x.

$\frac{3}{9} \times( - \frac{1}{5}) \times x = - \frac{7}{18} \\ \frac{ - 3 \times 1}{9 \times 5} \times x = - \frac{7}{18} \\ \frac{ - 3}{45} \times x = - \frac{7}{18} \\ x = ( - \frac{7}{18} ) \times ( - \frac{45}{3} ) \\ x = ( - \frac{7}{18} ) \times ( - 15) \\ x = \frac{7 }{18} \times 15 \\ x = \frac{7}{6} \times 5 = \frac{35}{6}$