9. if five times a number plus two is 17, what is the number? a. 5 b. 2 c. 3 d. 7

5 times a number plus 2 = 17
5n+2 = 17
     -2    -2
5n = 15

     5
n = 3

Yes, two vertical lines can be complementary

A. p = 2(l + w)p/2 - l = ww = p/2 - l b. while isolating the variable w in the equation, i first divided both sides by 2 and then i subtracted l from both sides. i hope this .