The mean wegight of a, b,c is30kg .if the mean weight ofa, bis36kgand b, cis25

Give the functions f(x) = |x + 2| - 3, what is the domain? a, b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2

Me because i don't understand how to do it.: )

Which is the equation in slope-intercept form for the line that passes through (3, 7) and is perpendicular to 3x-5y=8 a. y=5/3x+2 b. y=3/5x+2 c. y=-5/3x+12 d. y=-3/5x+5