SAT MATH PRACTICE VIDEOS
(Part - 2)

Problem 1 :

h = 3a + 28.6

A pediatrician uses the model above to estimate the  height h of a boy, in inches, in terms of the boy’s age a, in years, between the ages of 2 and 5. Based on the model, what is the estimated increase, in inches, of a boy’s height each year?

A)  3

B)  5.7

C)  9.5

D)  14.3

Solution :

Problem 2 :

The formula above gives the monthly payment m needed to pay off a loan of P dollars at r percent annual interest over N months. Which of the following gives P in terms of m, r, and N?

Solution :

Problem 3 :

If a/b = 2, what is the value of 4b/a?

A)  0

B)  1

C)  2

D)  4

Problem 4 :

g(x) = ax2 + 24

For the function g defined above, a is a constant and g(4) = 8. What is the value of g(-4)?

A)  8

B)  0

C)  -1

D)  -8

Problem 5 :

b = 2.35 + 0.25x

c = 1.75 + 0.40x

In the equations above, b and c represent the price per pound, in dollars, of beef and chicken, respectively, x weeks after July 1 during last summer. What was the price per pound of beef when it was equal to the price per pound of chicken?

A)  $2.60

B)  $2.85

C)  $2.95

D)  $3.35

Solution :

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