7 Marks: --/7 Find the value of the function g(x) = (x2 + 9)/3x when x = -3. Cho

Question

7
Marks: --/7
Find the value of the function g(x) = (x2 + 9)/3x when x = -3.
Choose one answer.
a. -4
b. -2
c. -3
d. -28
Question 8
Marks: --/7
Find the value of the function f(x) = ¼x² - ½x when x = ¾.
Choose one answer.
a. 3/16
b. 15/64
c. -15/64
d. 33/64
Question 9
Marks: --/7
Find the value of the function f(x) = .5x² - .7x + 1.2 when x = -0.3.
Choose one answer.
a. 1.035
b. 1.455
c. .375
d. 1.86
Question 10
Marks: --/7
True or False:

The following relation represents a function.

{(32, 8), (16, 7), (32, 4), (-16, 5)

Answer: True False

Explanation / Answer

g(x) = (x2 + 9)/3x when x = -3. g( -3) = 9 + 9 / ( 3 * -3) = 18/-9 = -2( its B) Find the value of the function f(x) = ¼x² - ½x when x = ¾. f(3/4) = 1/4 * 9/16 - 1/2 * 3/4 = 9/64 - 3/8 = -15/64 f(x) = .5x² - .7x + 1.2 when x = -0.3. f( -0.3) = 0.5 * 0.09 + 0.7*0.3 + 1.2 = 1.455 FALSE

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