The multiplication of two or more quantities may be expressed as the ? of the same quantities.

sum

Step-by-step explanation:

We have that, 'The multiplication of two or more quantities may be expressed as the repeated addition of the same quantities'.

i.e. multiplication of two or more terms is equal to adding as many copies of one of them.

i.e. a × b = a + a + ... ( 'b' number of times ) = b + b + ( 'a' number of times )

For example,

2 × 4 = 8

2 × 4 = 2 + 2 + 2 + 2 = 8 i.e. adding 2 four times

2 × 4 =  4 + 4 = 8 i.e. adding 4 two times

or

3 × 7 = 21

3 × 7 = 3 + 3 + 3 + 3 + 3 + 3 + 3 = 21 i.e. adding 3 seven times

3 × 7 = 7 + 7 + 7 = 21 i.e. adding 7 three times.

Hence,  'The multiplication of two or more quantities may be expressed as the repeated addition of the same quantities'.

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation: