Which expression is equivalent to 3 + 4y – y(9 – 2y) + 5? a. 8 – 7y b. 2y^2 - 5y + 8 c. -2y^2 - 5y + 8 d. -6y^2 + 27y + 8

The expression 3 + 4y – y(9 – 2y) + 5 is equivalent to 2y² -5y + 8  .

Option (B) is correct .

Step-by-step explanation:

As the expression given in the question be

=  3 + 4y – y(9 – 2y) + 5

First open the bracket

=  3 + 4y – 9y +2y² + 5

= 2y² -5y + 8

Therefore the expression 3 + 4y – y(9 – 2y) + 5 is equivalent to 2y² -5y + 8  .

Option (B) is correct .

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.

i got 142 as my answer

step-by-step explanation: