Ok need these 2 aswell to be simplified. Please help.​

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

What does x = in this equation x+3+2x=x+5

Which of the following could be the ratio of the length of the longer leg 30-60-90 triangle to the length of its hypotenuse? check all that apply. a. 313 6 b. 3: 215 c. 18: 13 d. 1: 13 e. 13: 2 of. 3: 15