Please help with this one, geometry

9514 1404 393

  a) 40°

  b) 70°

  c) 35°

  d) 105°

Step-by-step explanation:

a) x is half the given angle, so is ∠BAC/2 = 80°/2.

  x = 40°

__

b) ∠ABC has a value that makes the angles in the triangle have a sum of 180°.

  ∠ABC +∠BAC +30° = 180°

  ∠ABC = 180° -30° -80°

  ∠ABC = 70°

__

c) y is half the measure of ∠ABC, so is 70°/2.

  y = 35°

__

d) z has a value that makes the angles in its triangle have a sum of 180°.

  x + y + z = 180

  z = 180 -x -y = 180 -40 -35

  z = 105°

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²

the answer is c

step-by-step explanation: i took a test with this question on it