Answer:
18 tests
Step-by-step explanation:
Create a proportion where x is the number of tests after 9 weeks:
[tex]\frac{10}{5}[/tex] = [tex]\frac{x}{9}[/tex]
Cross multiply and solve for x:
5x = 90
x = 18
So, after 9 weeks, Vera will have taken 18 tests
Answer:
18
Step-by-step explanation:
18
10 tests = x tests
/ 5 weeks = / 9 weeks
10* 9= x5
90/5= 18