Answer:
26°
Step-by-step explanation:
AC=tan 64
BC=x=sec 64
Using sine rule
(Sin 64)/tan 64 = (sin BAC)/sec 64
Cos 64 = (sin BAC)(cos 64)
Sin BAC= 1
BAC=90
ACB+ 64+90=180
ACB= 26°
I believe it would be 4
This is because when divided by 3, 3x+12y=3 turns into x+4y=3
36÷6 is 6 to show your work for it maybe draw it out and better show the equation like when you solve a bigger problem.