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I need help with a few problems. Please help.

Perform the indicated operation.

-13 - (-22)
_______________
-11 - (-11)


A)9/22
B) 450
C)-13/-11
D)Undefined

Multiply (4)(–5)(10).

Find the reciprocal of (-1/5) (15)
Find the receiprocal of (-1/3)(9/2)(6)

Perform the indicated operation:

15-14
____________
(4)(4)-16

Please Help.

2 answers

-13-(-22)= -13+22 = 9
-11-(-11)=0

9/0

Thats undefined.
78-63
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