Question

A formula is expressed as D = a ( 2 + kt ) express k in terms of D, a and t

Answer 1

D=a(2+kt)
D=2a+akt
D-2a/at=akt/at
Answer. D-2a/at= k. at cancel

Answer 2

`\text{The formula is }k=(D)/(at)-(2)/(t)`

Explanation:

Given the formula D=a(2+kt)

we have to express k in terms of D,a and t

`D=a(2+kt)`

Divide by a on both both sides

`(D)/(a)=2+kt`

Subtracting 2 from both sides

`(D)/(a)-2=kt`

Divide by t throughout the equation

`(1)/(t)((D)/(a)-2)=k`

`k=(D)/(at)-(2)/(t)`

`\text{The formula is }k=(D)/(at)-(2)/(t)`