Alright, for 10, let's see 2(x+3). Use the distributive property to multiply 2 with x, which is 2x. Then, multiply 2 with 3, which is 6. Add them together to get 2x+6. For the second part, 4 times x is 4x and 4 times negative 2 is -8. Add them all up and you get 2x+6+4x-8=6x-2. Remember that you can't add a variable with other variables/just numbers, and a minus sign in front of terms in parenthesis means that everything in the parenthesis is negative!
Proportional mate try that maybe then
The answer to your problem is -9 and 3/4.
Answer: 
Step-by-step explanation:
The slope of line l is

Since parallel lines have the same slope, the slope of the line we need to find is -2.
Substituting into point-slope form,

1/(sqrt(1+x^2))..................