matthewquattlebum
28.03.2020 •
Mathematics
7. John has seven times as many books as Bob. Together they have 24 books. How many books does John have?
a.) 30
b.) 3
c.) 10
d.) 21
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Ответ:
Ответ:
Step-by-step explanation:
width= x
length= x+6
perimter = 2x+ 2(x+6)
36= 2x+ 2x+ 12
36= 4x + 12
36-12= 4x
4x= 24
x= 6
therefore width= 6cm
length= 6+6 = 12