Vera took 10 tests over a time of 5 weeks. After 9 weeks this quarter, how many tests will Vera have taken?

18

Step-by-step explanation:

18

10 tests     =   x tests

/ 5 weeks =   / 9 weeks

10* 9= x5

90/5=  18

18 tests

Step-by-step explanation:

Create a proportion where x is the number of tests after 9 weeks:

=

Cross multiply and solve for x:

5x = 90

x = 18

So, after 9 weeks, Vera will have taken 18 tests

answer: .75 km

step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50