Question

sheri bob and mark can inspect 40 disk drives per hour when all three are working. sheri and bob working together can inspect 28 per hour, and sheri and mark together can inspect 27 per hour. how many can each person inspect per hour?

Answer 1

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Answer 2

S+b+m=40
s+b=28
s+m=27

Equation 1-equation 2
M= 40-28=12
s=15
b=13

Answer 3

S means sheri
M means Mark
B means bob

Answer 4

thank you so much for your help!!