4. The difference between twice a number and half the number is 30. What is the number?
Help me please

20

Step-by-step explanation:

let the number be n then twice the number is 2n and half the number is n

Then the difference is

2n - n = 30 ( multiply through by 2 to clear the fraction )

4n - n = 60, that is

3n = 60 ( divide both sides by 3 )

n = 20

shift 4 units up, and 1 unit left.

it will translate f(x) = 3^x to g(x) = 3^(x+1) + 4