Question

Help!!!!!!!! I need help with these Algebra multiple choice questions!!!!!! I tried but I'm bad at math

1. Given the function j(x) = 3x^2 - 2x + 5 and k(x) = 3x^2 + 4, which operation results in a 1st degree polynomial?

A. Addition
B. Subtraction
C. Multiplication
D. No operations

2. Given the function f(x) = 2x - 1 and g(x) = 2x + 4, which operation result in the largest coefficient on the x term?

A. Addition
B. Subtraction
C. Multiplication
D. Two operations result in the same coefficient

3. Bob and Susie wash cars for extra money over the summer. Bobs income is determined by f(x) = 6x + 13, where x is the number of hours. Susie's income is g(x) = 4x + 18. If Bob and Susie were to combine their efforts, their income would be h(x) = f(x) + g(x). Assume bob works 3 hours. Create the function h(x), and indicate if Bob will make more money working alone or by teaming with Susie.

A. h(x) = 2x + 5, work alone
B. h(x) = 2x + 5, team with Susie
C. h(x) = 10x + 31, team with Susie
D. h(x) = 10x + 31, work alone

4. Simplify (x + 2)(x^2 - 4x - 9).

A. x^3 - 2x^2 - 17x - 18
B. x^3 - 6^2 - x - 18
C. x^3 - 4x^2 - 3x - 18
D. x^3 - 10x^2 - 9x - 18

5. Which of the following represents the area of a rectangle whose length is x - 7 and whose width is x + 12?

A. x^2 + 5x - 84
B. x^2 - 84
C. x^2 - 5x - 84
D. x^2 - 84x + 5

6. Simplify 2x^2(4x^2 + 9x - 13)

A. 6x^4 + 18x^3 - 26x^2
B. 8x^4 + 18x^3 - 26x^2
C. 8x^2 +18x - 26
D. 6x^2 + 18x - 26

7. Simplify (5x^3 - x + 14) - (3x2 - 9x + 4).

A. 5x^3 - 3x^2 + 8x + 10
B. 2x^2 + 8x + 10
C. 5x^3 - 3x^2 - 10x + 18
D. 2x^2 - 10x + 18

8. Simplify (4x^2 + 12x - 9) + (7x^2 - x 3)

A. 11x^2 + 12x - 6
B. 11x^2 + 13x + 6
C. 11x^2 + 11x + 6
D. 11x^2 + 11x - 6

9. What is the 2nd term when 3 + 2x^2 - 3x^4 + x^3 is arranged in the descending order?

A. 3
B. 2x^2
C. -3x^4
D. x^3

10. Identify the polynomial written in descending order.

A. 9 - 14x - 7x^2 + x^3
B. x^3 - 7x^2 - 14x + 9
C. -7x^2 + 9 + x^3 - 14x
D. -14x + x^3 + 9 - 7x^2

Answer 1

subtraction because there is subtraction operator

Answer 2

Answer:

subtraction because there is subtraction operator