Question

1. 18x^2 + 6 + 4x - 15x^2 - 4 + 13x
Answer: 3x^2 + 17x + 2

2. 3x^2 + 6 - 2x + 5x - 4x^2 + 9
Answer: -x^2 + 3x + 15

3. 3x^2 + 5x - 7x + 3 - 5x^2 + 2
Answer: -2x^2 + 2x + 5

4. In the expression -7x - 3x^2 + 5. What is the coefficient of x? Answer: I think it's 7 or -7

Thanks!

Answer 1

in #3
+ 5x - 7x = NEGATIVE 2 x

#4 negative 7

Answer 2

So number 1 and 2 are correct?
and Number 3 would be changed to -2x^2 - 2x + 5

Answer 3

yes

Answer 4

Thank you!

Answer 5

You are welcome.

Answer 6

people really dont have the test answers

Answer 7

when someone is done with the test can you post the correct answers here pls

Answer 8

1. 18x^2 + 6 + 4x - 15x^2 - 4 + 13x
A; 3x^2 + 17x + 2

2. 4x^2 + 4 - 5x + x - 2x^2 + 8
D; 2x^2 - 4x + 12

3. 4x^2 + 8x - 11x + 6 - 5x^2 + 2
A; -x^2 - 3x + 8

4. Coefficient of x in the expression -5x - 4x^2 + 9
B; -5

5. (m^2 - m - 4) + (m - 5)
D; m^2 - 9

6. (7x^2 - x - 2) - (-6x^3 + 3)
A; 6x^3 + 7x^2 - x - 5

7. Total earnings when adding 7t - 1 and 8t + 5
D; 15t + 4

8. f^2 * f^3
A; f^5

9. 64^10/64^5
D; 64^5

10. x^11/x^4
A; x^7

11. 4^4 * a^10
A; 4^14

12. 2^2 * 2^22
D; 2^24

13. 3^4/3^4
C; 1

14. 3^3/3^6
A; 1/27

15. (8 * 10^3) (7 * 10^5) in Scientific notation
B; 5.6 * 10^16

16. (2.2 * 10^-3) (4 * 10^-2) in Scientific notation
D; 8.8 * 10^-5

17. 7t^4 * 7t^4
A; 49t^8

18. -6(4x + 9)
D; -24x - 54

19. 4k^2(-3k^2 - 4k + 5)
A; -12k^4 - 16k^3 + 20k^2

20. (-8x) * 3x^2
C; -24x^3

21. (5y^2 - 2y) + (9y^2 - 9y)
C; 14y^2 - 11y

22. and 23. will most likely be different, so do them yourself.

Note that my answers are for the Connections Academy California students, and that each question may vary from student to student in order to prevent cheating, so check if your question matches mine first before inputting your answers.

If you are still stuck, I would recommend using Demos or the Symbolab calculators—especially the latter. Hope this helps any future 7th grade Math students!