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3 years ago

A) Car A travels x km for every litre of petrol while car B travels

Mathematics

1 answer:

ser-zykov [4K]3 years ago

5 0

Answer: 16 litres

Step-by-step explanation:

A: 1l x km

B: 1l x+5 km

Running 400 km A used 400/x litres

Running 400 km B used 400/(x+5) litres

400/x- 400/(x+5)= 4

400*(x+5)- x*400-4*x*(x+5)=0

400*x+2000-400*x-4*x²-20*x=0

2000-4*x²-20*x=0 difide by 4 both sides of equation

500-x²-5*x=0

Lets solve the equation using discriminant:

D=5²-(-1)*4*500=2025

sqrt(D)=45

x1= (5+45)/(-2)= -25 x2=(5-45)/(-2)=20

x1=-25 x2=20

x1<0 so is not the solution of the problem ( number of litres can't be negative)

So A uses litr per x=20 km and B uses 1 litr per 20+5=25 km

Running 400 km B uses 400/25=16 litres

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Answer:

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3 years ago

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Answer:

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Step-by-step explanation:

step 1

Find the total time

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step 2

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3 years ago

Translate the expression into a word phrase. k + 12 A. a number less than 12 B. 12 more than a number C. the product of a number

Burka [1]

The answer is b) 12 more than a number

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hope that helps, God bless!

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3 years ago

The population of rabbits on an island is growing exponentially. In the year 2008, the population of rabbits was 7100, and by 20

olganol [36]

Answer:

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Step-by-step explanation:

Unknown answer so ye that mean I'm not sure about it

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3 years ago

Ted is making trail mix for a party. He mixes 1 1/2 cups of nuts, 1/4 cup of raisins, and 1/4 cup of pretzels. How many cups of

cupoosta [38]

Answer:

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Step-by-step explanation:

Ted is making trail mix for a party. He mixes 1 1/2 cups of nuts, 1/4 cup of raisins, and 1/4 cup of pretzels.

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3 years ago