Answer to Question #56375 in Algebra for Butch DeLoria

Question

4: Which of the following is a true statement about functions.

A: If A and B are matrices, then AB = BA

B: If f and g are functions, then (f o g)(x) = (g o f)(x)

C: If f and g are functions, then (f + g)(x) = (g + f)(x)

D: If f is a function, then f(a + h) =f(a) +f(h)

5: None

6: Solve the system of equations below.
5x -2y = 18
3x +3y = 15

A: (1,4)
B: (-1,4)
C: (4,1)
D: (-4,1)

7: Find the sum of the first 50 terms of the sequence below.
An = 3n + 2
Answer: ______

8: If you save one penny on January 1, two pennies on January 2, three pennies on January 3, and continue this pattern for one year (not a leap year), what will be the value of your entire savings, in dollars at the end of that one year? Express your answer as a decimal.
Answer: _____