Answer:
4a + 3d + 15
Step-by-step explanation:
Remove parentheses.
3d + 9 + 4a + 6
Add 9 and 6.
3d + 4a + 15
Reorder 3d and 4a.
-2(7-15) / 4
-2(-8) = 16
16/4 = 4
Answer is 4
Please refer to the above attachment
sec
1/cosin = sec or cosin^-1
x^3(15x^4y^2+4)
