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SAT - Math

Wrong Options (more)

Question 6 of SAT Math D113 has wrong options. Where do I report this? 

 

The amount of money a teacher earns is directly proportional to the number of students he teaches. The teacher earns $ 250 when he teaches 4 students. How much will he earn if he teaches 15 students?


Options:

A.

500

B.

1025

C.

1175

D.

1125

 

Solution

earning ex no of students

          ⇨ earning = constant × no. of students

          ⇨ 250 = constant × 4

          ⇨ Constant =  = 75

           So, for 15 students earning = 75 × 15 = $ 1125 

 

For this solution, the teacher should earn $300 and not $250. 

Wrong Options (more)

Question 6 of SAT Math D113 has wrong options. Where do I report this? 

 

The amount of money a teacher earns is directly proportional to the number of students he teaches. The teacher earns $ 250 when he teaches 4 students. How much will he earn if he teaches 15 students?


Options:

A.

500

B.

1025

C.

1175

D.

1125

 

Solution

earning ex no of students

          ⇨ earning = constant × no. of students

          ⇨ 250 = constant × 4

          ⇨ Constant =  = 75

           So, for 15 students earning = 75 × 15 = $ 1125 

 

For this solution, the teacher should earn $300 and not $250. 

b

Wrong Options (more)

Question 6 of SAT Math D113 has wrong options. Where do I report this? 

 

The amount of money a teacher earns is directly proportional to the number of students he teaches. The teacher earns $ 250 when he teaches 4 students. How much will he earn if he teaches 15 students?


Options:

A.

500

B.

1025

C.

1175

D.

1125

 

Solution

earning ex no of students

          ⇨ earning = constant × no. of students

          ⇨ 250 = constant × 4

          ⇨ Constant =  = 75

           So, for 15 students earning = 75 × 15 = $ 1125 

 

For this solution, the teacher should earn $300 and not $250. 

D

Results on the Bar Exam of Law School Graduates The table above summarizes the results of 200 (more)

  Passed Bar Exam Did not pass bar exa
Took review course 18 82
Did not take review course 7 93

Results on the Bar Exam of Law School Graduates. The table above summarizes the results of 200 law school graduates who took the bar exam. If one of the surveyed graduates who passed the bar exam is chosen at random for an interview, what is the probability that the person chosen did not take the review course?

x= total Law School Graduates- Did not pass bar exam- who took review course who passed the bar exam. x= 200-175-18 x=7

In the equation above a b and c are constants If the equations is true for all values of x what is the value of b (more)

2x(3x 5) 3(3x 5) = ax2 bx c

In the equation above, a, b, and c are constants. If the equations is true for all values of x, what is the value of b?

2x(3x + 5) + 3(3x + 5) = ax2 + bx + c

expanding LHS
6x2 + 10x + 9x + 15 = ax2 + bx + c

6x2 + 19x + 15 = ax2 + bx + c

comparing coeficients

b = 19