Answer My Algebra Questions- Functions Equation 2

Algebra
Tutor: None Selected Time limit: 1 Day

1. Evaluate the function f(x) = 3x – 2, when x = –1.

       –9

       –5

       1

       5

 . Evaluate the function  ,9(t)4/5t when t = 50.

       45

       40

       35

       30

Evaluate the function H(x) = 18 – x, when x = –6.

(Points : 1)

       108

       12

       –24

       24

. Find k(3) for the function k(n) = 2n2.

       12

       18

       27

       36

 . Find w(7) for the function w(x) = 5x + 2.

       59

       45

       37

       13

Apr 14th, 2015

1.  f(x) = 3x-2 when x=-1

f(-1) = 3(-1) - 2 = -3-2 = -5

2. f(t)= 4/5t when t = 50

f(50) = 4/5(50) = 4 * 10 = 40

3. H(x) = 18 – x, when x = –6

H(-6) = 18 - (-6) = 18 + 6 = 24

 4. k(3) for the function k(n) = 2n2.

k(3) = 2(3)2 = 12 , however if the 2 after the n means "squared" then it is 2(3)^2 = 2(9) = 18

5. w(7) for the function w(x) = 5x + 2

w(7) = 5(7) + 2 = 35 + 2 = 37

Answers are highlighted.  For k(3) for k(n) = 2n2, I wasn't sure of the 2 after the n mean 2 * n * 2 or 2 * n^2 where ^ means (to the power).  I did it both ways just in case.



Apr 14th, 2015

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