Can someone help I’ll mark as brainlest if you know both and can explain !

20) A

21) 52

Step-by-step explanation:

20) The area of a triangle is bh. The base is 6 and the height 4. Subsituting this in gives you 12. Double it for the answer as there are two triangles.

21) Area of ABD is given by the same formula, the base is 4 and the height 12. Substituting this in gives you 24. Add the area of the BCD triangle which is given as 28. Meaning that the answer is 52.

Hope this helped!

theres no picture: /

step-by-step explanation:

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068