Question

Please help me ASAP!!!

Answer 1

And the answer for b is 55

Answer 2

Well, the inside angles of all triangles add up to 180°, so you come to this equation:

$(3x + 1) + (2x - 1) + 40 = 180$

Which can be simplified to:

$5x + 40 = 180$

Subtract the 40 from both sides, then divide by 5 and you'll have X!

$5x = 140$

$x = 28$

Plug that X back into the equation for angle B, and solve

$2(28) - 1 = 55$

Which is choice B