Answer:
4y²-1/4 is the required answer
Step-by-step explanation:

Answer: The first question is a corrosponding angle, which means the measure is the same. So, angle KRQ is 146°.
And QRN is 128°.
If 19 is half (50%) of something, find that number you would just have to multiply 19 by 2.
This means that 19 is 50% of 38.
Sin 16 because cos and sin are similar