Question

Which expression is equivalent to mc014-1.jpg?
mc014-2.jpg
mc014-3.jpg
mc014-4.jpg
mc014-5.jpg

Answer 1

Answer:19 - 28/n  has a value of 15 when n=7

Step-by-step explanation:

Expression are

43 - 5n

3n - 5

6n - 28

19 - 28/n

when n = 7

43 - 5n = 43 - 5 * 7 = 43 - 35 = 8  ≠ 15

3n - 5 = 3*7 - 5 = 21 - 5 = 16 ≠ 15

6n - 28 = 6 * 7 - 28  = 42 - 28 = 14  ≠ 15

19 -  28/n = 19  - 28/7  = 19  - 4 = 15 = 15

19 - 28/n has a value of 15 when n=7

Answer 2

The correct answer is mc014-3.jpg.

Explanation:

• mc014-3.jpg expression is equivalent to mc014-1.jpg.
• Equivalent expressions are expressions that work the same even though they look different.
• If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value(s) for the variable(s).
• For example: 3(x + 2) and 3x + 6 are equivalent expressions because the value of both the expressions remains the same for any value of x. 3x + 6 = 3 × 4 + 6 = 18. and can also be written as 6(x2 + 2y + 1) = 6x2 + 12y + 6.