Pls help this is my last problem and I need to pass this class?!?

A = 50°

Step-by-step explanation:

Then

Actually Welcome to the Concept of the Triangles.

Since we know that, the Angle sum property of a triangle is equal to 180°.

means that, <A + <B + <C = 180°

so we can write as,

==> 2x-10 + x + 30 +70 = 180°

===>3x +90 = 180

==> 3x = 90

hence, x = 30°

so now, substitute angle x,

So angle A is => 2(30)-10 => 60-10 = 50°

hence Angle A = 50°.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72