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Nata [24]
3 years ago
9

Salena, Justin, and Brandon were riding their bikes to the library after school. The library is 12 1/2 miles from school. Salena

rides her bike 2 1/2 miles every five minutes. Justin rides his bike 5 3/4 miles every 12 minutes. Brandon rides his bike 114 miles every 258 minutes. Who got to the library first? *
Mathematics
1 answer:
faust18 [17]3 years ago
3 0

Answer:

Salena's got to the library first

Step-by-step explanation:

12½ miles = 25/2 miles

2½ miles = 5/2 miles

5¾ miles = 23/4 miles

114 miles = 114 miles

Salena's time of arrival =

if 5/2 miles : 5 minutes

then 25/2 miles : ?

25/2 ÷ 5/2. × 5

25/2 × 2/5 × 5

25 minutes

Justin 's time of arrival=

if 23/4 miles : 12 minutes

25/2 miles : ?

25/2 ÷ 23/4 ×12

25/2 × 4/23 ×12

26 minutes approximately

Brandon 's time of arrival=

if 114 miles : 258 minutes

25/2 miles : ?

25/2 ÷114 ×258

25/2 × 1/114×258

25 × 1/57 × 258

113 minutes approximately

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