The answer is $200 the equation is 20+10(3)+150
We can write that 40% of the full amount is 30 marks.
Using x for the full amount, we can say 0.4x=30.
To solve for x, we devide both sides by 0.4 (or equivalently, multiply by 2.5).
We get x = 75 marks.
Answer:
3,5
Step-by-step explanation: