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anonymous

  • one year ago

12. Which equation is an identity? (1point) A.8-(5x + 2)= 5x - 6 B.7z + 10 - z = 8z - 2(z-5) C.8m - 4 = 5m + 8 - m D.6y + 5 = 6y - 5 13. Which equation has no solution? (1point) A. 7v + 2 = 8v - 3 B. 3x - 5 = 3x + 8 - x C. 4y + 5 = 4y - 6 D. 7z + 6 = -7z - 5 14. Solve the following equation (1point) 5(z - 4) - z = 4z - 20 A. 4 B. -4 C. Infinitely many solutions D. No solution 15. Solve the following equation (1point) 4 + 2y = 9 + 2y A. 4 B. -4 C. Infinitely many solu

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  1. anonymous
    • one year ago
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    @didithedad

  2. anonymous
    • one year ago
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    Sorry the reply took so long. An identity is an equation which is true for every value of the variable is called an identity equation. To make it shorter, I will do 1 example. B says that 7z + 10 - z = 8z - 2(z-5) Well 7z - z would be 6z + 10. the other equation is 8z - 2z-10 simplified it is 6z-10 6z-10 and 6z + 10 are not the same, so it is not b. The answer is C.

  3. anonymous
    • one year ago
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    Thanks dude

  4. anonymous
    • one year ago
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    Skipping down to 14. 5(z - 4) - z = 4z - 20 Simplify 5z - 20 - z = 4z - 20 4z - 20 = 4z - 20 The answer would be infinite. No matter what you put in for z, the answer will always be the same. C.

  5. anonymous
    • one year ago
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    #15 4 + 2y = 9 + 2y No solutions.

  6. anonymous
    • one year ago
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    13 is z.

  7. anonymous
    • one year ago
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    Sorry, i meant C

  8. anonymous
    • one year ago
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    So 12= C 13= C 14= C 15= no solutions

  9. anonymous
    • one year ago
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    not completely 100% on those answers, but its the best I can do. :)

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