Answer:
9) <4=89
10) x=35
Step-by-step explanation:
9) 52+39=91
180-91=89
10) 2x+x+13+62=180
3x+75=180
-75 -75
3x=105
105/3=35
y = - 27/5
4(3) - 5y = 39
12 - 5y = 39
-5y = 39 - 12 = 27
the first one
D= -16.8