SAT MATH PREPARATION VIDEOS
(Part - 3)

Problem 1 :

f(x) = ax² - 15

For the function f above, a is a constant and f(3) = 10. Which of the following is equal to the value of f(5)? 

A)  f(0)

B)  f(-3)

C)  f(3)

D)  f(-5)

Solution :

Problem 2 :

A certain job can be done in 20 hours by 4 people. How many people are needed to do the same jon in 10 hours?

A)  2

B)  4

A)  8

A)  10

Solution :

Problem 3 :

Which of the following is equivalent to

f(x) = x² - 6x + 7

A)  f(x) = (x + 3)² + 5

B)  f(x) = (x - 3)² + 2

C)  f(x) = (x - 3)² - 2

D)  f(x) = (x - 7)(x + 1)

Solution :

Problem 4 :

If 24x² - kx + 16 = (3x + 4)(ax -b) for all values of x, where a, b and k are constants, what is the value of k?

A)  -44

B)  -12

C)  12

D)  44

Solution :

Problem 5 :

In the xy-plane, the equation of line ℓ is x + 3y = 5. If line m is perpendicular to line ℓ, what is a possible equation of line m?

Solution :

Problem 6 :

A)  3

B)  4

C)  5

D)  6

Solution :

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