Hello there!
(a + b)² = a² + 2ab + b²
= a² + b² + 2ab
= 16 + 2(8)
= 16 + 16
= 32
As always, it is my pleasure to help students like you!
You should use Order of Operations or PEDMAS for this (Parenthesis, Exponents, Division and Multiplication in the order they appear, Addition and Subtraction in the order they appear). So we do the 2+12 because that is in parentheses first which gives 14-3+6. Next we do 14-3 because there are no exponents and no division or multiplication, which gives 11+6. This yields your answer, 17.
Y= -1/5 x+ 6
remember that slope intercept form is y=mx+b
the m is the slope and the b is the y value in (0,6) aka y-intercept
so all you have to do is swap the slope given with m and swap the b with the y-intercept
