Question

add the following rational number

a)
$\frac{4}{?9} + \frac{7}{ - 12?}$

b)
$- 4 + \frac{4}{? - 7}$
​

Answer 1

Step-by-step explanation:

a) 4/9+7/-12

=4/9+-7/12

=16+(-21)/36

=16-21/36

=5/36

answer is 5/36

Answer 2

Answer:

Speed is a scalar quantity – it is the rate of change in the distance travelled by an object, while velocity is a vector quantity – it is the speed of an object in a particular direction

Step-by-step explanation:

good afternoon