Answer:
15 two-point questions and 5 four-point questions.
Step-by-step explanation:
Let x represent number of two-points questions and y represent number of four-points questions.
We have been given that Janice wants to create a test containing 20 questions. We can represent this information in an equation as:

Since all questions are worth 50 points. We can represent this information in an equation as:

From equation (1), we will get:

Upon substituting this value in equation (2), we will get:







Therefore, there are 5 questions that are worth 4 points each.
Now, we will substitute
in equation (1) to solve for x.



Therefore, there are 15 questions that are worth 2 points each.
Answer:
2/7
Step-by-step explanation:

Answer:
a) f(-1/2) = -2 is NOT TRUE.
b) f(0) =3/2 is TRUE.
c) f(1) = -1 is NOT TRUE.
d) f(2) = 1 is NOT TRUE.
e) f(4) = 7/2 is TRUE.
Step-by-step explanation:
Here, the given function is 
Now, checking for each values for the given function:
a) Putting x = (-1/2):

and (5/4) ≠ -2
Hence, f(-1/2) = -2 is NOT TRUE.
b)Putting x = 0 :

Hence, f(0) =3/2 is TRUE.
c) Putting x = 1:

Hence, f(1) = -1 is NOT TRUE.
d)Putting x = 2:

and (5/2) ≠ 1
Hence, f(2) = 1 is NOT TRUE.
e)Putting x = 4:

Hence, f(4) = 7/2 is TRUE.
Answer:
1.5m/s^2
Step-by-step explanation:
acc= change in velocity/time
acc=5.5-1/3
acc=4.5/3
acc=1.5