Me !

what is the missing reason in steps 7 and 8 of the proof?

a. definition of sine in right triangle
b. definition of equilateral triangle

  A. definition of sine in right triangle

Step-by-step explanation:

Steps 6 to 10 are a copy of steps 2 to 5, using different vertices and sides. Since the two developments are substantially identical, the reasons will be identical:

  reason 7 = reason 8 = reason 2 = reason 3 = "definition of sine in right triangle"

d, x=8

step-by-step explanation:

simplifying

4x + -5 = 2x + 11

reorder the terms:

-5 + 4x = 2x + 11

reorder the terms:

-5 + 4x = 11 + 2x

solving

-5 + 4x = 11 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-5 + 4x + -2x = 11 + 2x + -2x

combine like terms: 4x + -2x = 2x

-5 + 2x = 11 + 2x + -2x

combine like terms: 2x + -2x = 0

-5 + 2x = 11 + 0

-5 + 2x = 11

add '5' to each side of the equation.

-5 + 5 + 2x = 11 + 5

combine like terms: -5 + 5 = 0

0 + 2x = 11 + 5

2x = 11 + 5

combine like terms: 11 + 5 = 16

2x = 16

divide each side by '2'.

is should be y = 5x

step-by-step explanation:

correct me if im wrong