please choose the correct answer for the problems below

7. Simplify: [- (-4) ] - 1-8-41 13. Perform the appropriate operation: 400.53 - 35.94 [A] - 8 [B] - 16 [C] 8 [D] 16 None of these [A] 365.59 [BJ 365.69 [C] 364.59 [D] 436.47 [E] None of these 14. Perform the appropriate operation: 34.163 + 7.137 +304.6 1000 [A] 345.306 [B] 345.9 [C] 44.346 [D] 410.9 [E] None of these to 450 8. Find x. 15. Simplify: - 5 + (-3) +4-3+(-6) [A] 145 [B] 215 [C] 45 [D]) 35 [E] None of these [A] - 1 [B])- 13 5 [D] 10 [E] None of these 9. A circle has degrees. 16. What is the approximate area of a circle with a radius of 3 in ? (Use x =