## anonymous one year ago What property is shown? –8 + (–15) = (–15) + (–8) A. commutative property B. associative property C. opposite of a sum property D. distributive property

1. anonymous

@texaschic101

2. anonymous

@pooja195

3. Michele_Laino

hint: when I swap the operands, I'm applying the commutative property

4. anonymous

A. commutative property

5. anonymous

A? im not good with math

6. Michele_Laino

that's right!

7. anonymous

oh i pressed enter

8. anonymous

lol i have 4 more plz

9. Michele_Laino

ok!

10. anonymous

Which is an example of the opposite of a sum property? A. –17 + 32 = 32 + (–17) B. –26 + (4 + 8) = (–26 + 4) + 8 C. –5(6 + 3) = –5(6) + –5(3) D. –(–17 + 5) = 17 + (–5)

11. anonymous

i think D

12. Michele_Laino

in general the opposite of a sum is given by the subsequent formula: $- \left( {a + b} \right) = - a - b$ where a qnd b are two real numbers

13. Michele_Laino

and*

14. Michele_Laino

so, you are right!

15. anonymous

What is the value of the expression? 12.4 + (–2 + 1.6) A. 11 B. 12 C. 15 D. 16

16. Michele_Laino

we have to solve the computation inside the parentheses, so we have: 12.4+(-2+1.6)=12.4+(-0.4)=12.4-0.4=...?

17. anonymous

i think B

18. Michele_Laino

that's right!

19. anonymous

What value of q makes the statement true? –(q + 14) = –3 + (–14) A. –17 B. –3 C. 3 D. 17

20. Michele_Laino

at the rigt side we can write this: -3+(-14)=-3-14=...? please complete

21. Michele_Laino

right*

22. anonymous

-3+(-14)=-3-14=im thinking

23. Michele_Laino

ok! and what is -3-14=...?

24. anonymous

wait i think A

25. anonymous

am i correct

26. Michele_Laino

more precisely: right side= -17 now we can rewrite your original expression, as below: -(q+14)=-17 from which I can write this: q+14=17 so, what is q?

27. anonymous

-17

28. Michele_Laino

we have to find a number which added to 14 gives 17. what is such number?

29. anonymous

ok i had it but u r confusing me

30. anonymous

3 i guess

31. Michele_Laino

q=3 because 3+14=17

32. anonymous

ohhhh ok

33. Michele_Laino

that's right, your option is C

34. anonymous

Use an addition property to solve for c. 14 + (–12) = –12 + c A. –26 B. –14 C. 14 D. 26

35. anonymous

last 1

36. Michele_Laino

if I apply the commutative property, I can write this: 14+(-12)=-12+14 so, what is c?

37. anonymous

14=C

38. Michele_Laino

correct!!

39. anonymous

yay i got a 100

40. Michele_Laino

:) :)

41. Michele_Laino

congratulations!!