I believe it’s the first one. i’m very sorry if it’s wrong
Answer:
The scale drawing is 20 units by 4 units
Step-by-step explanation:
20/5 = 4
100/5 = 20
Answer:
Option C, 
Step-by-step explanation:





Answer: Option C, 
Answer:
After 4 days, the number of people attending both conferences be the same.
Step-by-step explanation:
We are given the following in the question:
Maths conference:
Number of people already signed = 7
Number of people who sign up each day = 2
Thus, the number of people who will sign up for maths conference in x days will be given by the linear function:

History conference:
Number of people already signed =11
Number of people who sign up each day = 1
Thus, the number of people who will sign up for maths conference in x days will be given by the linear function:

Both conference will have same number of people when

Thus, after 4 days, the number of people attending both conferences be the same.