Urgent Math please check

posted by Brittany

Very Important I can get someone to check these for me... I have to get an A, and I was wondering if someone could double check these for me. I am about 95% sure they are right, but just need a fresh set of eyes. I know I've been sending alot, but I really need them to be double checked. Thanks so much!! :)

1. Simplify 2e^2+9e+3+3e^2-5e-2.
A. 5e^2+4e+1
B. -e^2+4e+5
C. 5e^2+14e+1
D. -e^2+14e+5
My answer was A. 5e^2+4e+1

2. Find the degree of 1+2x^4+2x^2
A. 4
B. 3
C. 1
D. 2
My answer was A. 4.

3. Find the degree of 7x+2
A. 4
B. 3
C. 2
D. 1
My answer was D. 1.

4. Write the variable expression. It is 4 black squares,4 skinny white rectangles, and 19 little white squares.
A. 4x^2+4x+19
B. 4x^2-4x-19
C. -4x^2-4x+19
D. -4x^2+4x+19
My answer was D. -4x^2+4x+19

5. Simplify 4q^2-5q-1-8q^2+8q-9
A. -4q^2+3q+8
B. 12q^2+3q-10
C. -12q^2-13q-10
D. -4q^2-13q+8
My answer was B. 12q^2+3q-10

6. Subtract (7x-5y) - (2x+4y)
A. 9x-9y
B. 9x-y
C. 5x-9y
D. x-y
My answer was C. 5x-9y

7. Add (6x+2y) + (3x-4y)
A. 3x-2y
B. 3x+6y
C. 9x-2y
D. 9x-2y
My answer was C. 9x-2y

8. Add (-4x-2y) + (7x-5y)
A. 11x+3y
B. 11x-7y
C. -3x+3y
D. -3x-7y
My answer was B. 11x-7y

9. Subtract (-4x^5 -5x) - (7x-5-8x^5)
A. 4x^5 -12x+5
B. -12x^5+12x+5
C. -11x^5 -13x-5
D. -13x^5 +2x-5
My answer was A. 4x^5 -12x+5

10. Subtract (4x+2y) - (8x-3y)
A. -4x-y
B. 12x-y
C. 12x+5y
D. -4x+5y
My answer was D. -4x+5y

11. Simplify 5x^4(7x+5)
A. 35x^4+5
B. 12x^5+25x^4
C. 12x^2+10x
D. 35x^5+25x^4
My answer was 35x^5+25x^4

12. What multiplication expression is shown by the model? It has two columns down, 2 big squares down and three below that. So its 10 squares all together.
A. 2x(2x+3)
B. 3x(2x+3)
C. x(x+6)
D. (x+3)(x+2)
My answer was A. 2x(2x+3). This one
I am 100% sure on, but still.

13. Simplify x^6 times x^4
A. x^10
B. x^24
C. 2x^24
D. 2x^10
My answer was A. x^10

14. Simplify -4x(2x^4+2)
A. -8x^4-2
B. -2x^5+8x
C. -2^4-6x
D. -8x^5-8x
My answer was D. -8x^5-8x

15. Find the area of the figure. The length is 4x^2+2x and the width is 3x.
A. 7x^3+5x^2
B. 4x^2+5x
C.10x^2
D. 12x^3+6x^2
My answer was D. 12x^3+6x^2

  1. PsyDAG

    1, 2, 3. Correct

    Don't know about 4.

    5. It seems like you might have a typo. I get
    -4q^2+3q-10

    6, 7. Correct

    8. Typo? I get 3x-7y.

    9, 10, 11. Correct

    12. Don't have model.

    13, 14, 15. Correct.

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