Question

The product of 2 rational numbers is -15. If one of the numbers is -16/5, FInd the other number

Answer 1

Answer- The above question is from the chapter 'Rational Numbers'.

Rational Numbers- Numbers which can be written in the form of p/q where p,q are integers and q ≠ 0.

Decimal expansion of rational numbers is always terminating or non-terminating but repeating.

Example: 0, 2/3, -4/7, 2.1212..., etc.

Irrational Numbers- Numbers which can't be written in the form of p/q.

Decimal expansion of irrational numbers is always non-terminating non- repeating.

Example: π, √3, √7, 2.343443444..., etc.

Question: The product of 2 rational numbers is -15. If one of the numbers is -16/5, Find the other number.

Solution: Let the required number be x.

x × -16/5 = -15

Transposing -16/5 to R.H.S., we get

x = -15 ÷ -16/5

Taking reciprocal of -16/5, we get

x = -15 × 5/-16

- and - will get cancelled.

x = (15 × 5)/16

x = 75/16

∴ Required number = 75/16

Answer 2

Let the other number = x


Then,


-16/5 * x = -15


x = -15 /-5 * 16


x = 3 * 16


x = 48



Hope this helps you
Pls mark this as the brainliest answer