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Clerry
04.07.2020 •
Mathematics
Help please : ill givve
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Ответ:
2.86 hours = £26.57
Step-by-step explanation:
5 builders = 3.5 hours
Express it in ratio form:
5 : 3.5 (B1:H1)
However, on Tuesday 2 builders(B2) are available. We can set up a proportion to find the number of hours.
Since This is an inverse proportion, it will be written like:
=> B1:H1 = H2:B2
Where H2 = x(no. of hours)
=> 5 : 3.5 = x : 2
Product of means = Product of Extremes
=> 5*2 = 3.5x
=> 10 = 3.5 x
Dividing both sides by 3.5
=> x = 2.86 hours
Now, On Tuesday:
1 hour = £9.3
For 2.86 hours,
2.86 hours = £9.3 × 2.86
2.86 hours = £26.57
Ответ:
£83.7
Step-by-step explanation:
Since the amount of work is same:
Total time required: 5*3.5= 17.5 hours
Time split between 2 builders= 17.5/2= 8.75 hours ≈ 9 hours
It is counted as full hours as the builders get paid same for incomplete hours.
Each builder gets= 9*£9.30= £83.7
Ответ:
you solve the equation for a, by finding a,b,c of the quadratic then applying the quadratic formula