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Drupady [299]
3 years ago
5

The average petrol consumption of a vehicle is 1 gallon per 35 km. The cost of 1 litre of petrol is $49. Fund the cost of petrol

for a journey of 280 km.
(take 1 gallon=4.5 litres)
Mathematics
1 answer:
fomenos3 years ago
8 0

Step-by-step explanation:

Total petrol consumption of the journey=

Total distance travelled ÷ Average petrol consumption

= 280 \div 35 \\  = 8 \: gallons

Given 1 gallon = 4.5 litres,

8 \: gallons \:  = 8 \times 4.5 \\  = 36 \: litres

Total cost of petrol for this particular journey = Petrol consumed x cost of 1 litre of petrol

= 4.5 \times 49 \\  = 220.50 \: dollars

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Sophia has an ear infection. The doctor prescribes a course of antibiotics. Sophia is told to take 500 mg doses of the antibioti
julsineya [31]

Answer:

see below

Step-by-step explanation:

Dosage= 500 mg

Frequency= twice a day (every 12 hours)

Duration= 10 days

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We can build an equation to calculate residual drug amount:

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After first dose residual drug amount is:

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After second dose:

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Maximum residual drug will be in the body:

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5 0
2 years ago
5(x+7)+2 = 4(x - 1) + 1
Nadya [2.5K]

Answer:

x = -40

Step-by-step explanation:

First we distribute

5x + 35 + 2 = 4x - 4 + 1

Collect like terms

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6 0
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Overview
Alisiya [41]

Answer:

125.4

Step-by-step explanation:

Given

Number = 125.3546

Required

Round to 1 decimal place

Up till the first decimal place, the number is:

Number = 125.3

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The conditions for approximation are:

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In this case: 5 > 4, so we approximate to 1

Add this "1" to the last digit of 125.3. This becomes 125.4

<em>Hence: when the number is approximated to 1 decimal place, the digit is 125.4</em>

7 0
2 years ago
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