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avanturin [10]
3 years ago
13

10.2 divided by (unknown number)= 0.8. Find the unknown number

Mathematics
2 answers:
NeTakaya3 years ago
8 0

Answer:

x = 12.75

Step-by-step explanation:

10.2 : x = 0.8

x = 10.2 : 0.8

= 102/10 : 8/10

= 102/10 × 10/8

= 102/8

= 12.75

schepotkina [342]3 years ago
7 0

Answer:

12.75

Step-by-step explanation:

if 10.2 /y= 0.8,

then 10.2/y = 0.8/1.

( cross multiply ), we have that

10.2*1=9.8*y

so,10.2=0.8y

(divide both sides by the coefficient of y)

y=10.2/0.8

y = 12.75

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David hikes 21/4 miles in 1/2 an hour. What is his rate in miles per hour? At this rate, how long will it take him to walk 18 mi
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Answer:

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Step-by-step explanation:

Given as :

The distance cover by David = \frac{21}{4} miles = 5.25 miles

The time taken by David        = \frac{1}{2}  hours  = 0.5 hours

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A)or,  Speed = \frac{Distance}{Time}

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∴     speed = 10.5 miles per hour

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SO, with speed 10.5 miles per hour

The Time taken by him =  \frac{Distance}{speed} hours

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<u>C) Again the Time taken by him = 7 hours   </u>

So, Distance cover by him with speed 10.5 mph

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C)  Distance = 10.5 mph × 7 hours = 73.5   miles   Answes

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Joel sells ice cream cones at the country fair. he has to rent the equipment for $36 and spend $0.52 on ingredients for each con
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