For number 15 and 16, you just have to find the absolute difference between the two points along the calibration of the protractor.
15. ∠BXC = |B - C| = |140° - 110°| = 30°
16. ∠BXE = |B - E| = |140° - 30°| = 110°
For numbers 20 and 21, apply the Angle Addition Postulate. This is when you add the individual interior angles to equate to the total angle.
20. ∠PQS = ∠PQR + ∠RQS
112° = 72°+ 10x°
x = 4
21. ∠KLM = ∠KLN + ∠NLM
135° = 47°+ 16y°
y = 5.5
Answer: (4x−9)(3x+4) D
Step-by-step explanation:
Factor 12x2−11x−36
12x2−11x−36
=(4x−9)(3x+4)
t = 2 → A true
given I = PRT
to find T , divide both sides by PR
note that R = 6% = 
= 0.06
T = 
= 42/( 350 × 0.06 ) = 2
