The phrase "twice the sum of a number and three" can be written as which variable expression? a. 2n + 3 b. 2 + (2n + 3) c. 2(n + 3) d. 2(2n - 3)

C ) 2( n + 3) .

Step-by-step explanation:

Given  : The phrase "twice the sum of a number and three" can be written as which variable expression.

To find : Write expression .

Solution : We have given "Twice the sum of a number and three".

Let the number  =  n.

According to question :

Sum of the number and 3 = n + 3 .

Twice the sum of number and 3 = 2( n + 3) .

We can say phrase is 2( n + 3) .

Therefore, C ) 2( n + 3) .

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s