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3 years ago

If your car can travel 20 miles on 1 gallon of fuel how many litres were used to travel 130 miles? Step by step

Mathematics

1 answer:

Bezzdna [24]3 years ago

3 0

Answer:2600 Gallons

Step-by-step explanation: You first have to take 130 and times it by 20 then times it by 1. make sure you add labels

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3 years ago

Which of the following is an extraneous solution of the square root of -3x-2=x+2

yarga [219]

Answer:

x=-6 is an extraneous solution

Step-by-step explanation:

we have

$\sqrt{-3x-2} =x+2$

squared both sides

$-3x-2=(x+2)^2$

$-3x-2=x^2+4x+4$

$x^2+7x+6=0$

solve the quadratic equation by graphing

The solution is x=-6 and x=-1

see the attached figure

<u><em>Verify each solution</em></u>

substitute the value of x in the original expression

For x=-6

$\sqrt{-3(-6)-2} =-6+2$

$\sqrt{16} =-4$

$4=-4$ ----> is not true

Is an extraneous solution

For x=-1

$\sqrt{-3(-1)-2} =-1+2$

$\sqrt{1} =1$

$1=1$ ----> is true

Is the solution

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Find the sum of each group of numbers. You may add the numbers in any order. Then, check your work by adding the numbers again i

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4 years ago

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