Answer:
b/c
Step-by-step explanation:
Sin B = opposite side/ hypotenuse = AC/AB
50+25x=70+20x
<u>Use the law of cosines:</u>
<u>Substitute the values:</u>
1/2
25/5
12/25
1/5
Hope it helps!
76.75
83.5 + 70= 153.5
153.5 / 2 = 76.75
Your grade would be 76.75.
HOPE THIS HELPED