Wats the correct answer here

Mathematics

2 answers:

marta [7]3 years ago

8 0

It is 10 hours and 20 minutes because if you round 7:50 to 8:00 and count from 8:00 to 5:20 you have 10 hours and 20 minutes.

nevsk [136]3 years ago

4 0

Well I think it's 10 hours and 20 minutes you just have to count the hours but subtract one hour because of lunch then add the remaining minutes.

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Andrew [12]

Having obtained:

$x^2+ \frac{b}{a}x+( \frac{b}{2a} )^2+ \frac{c}{a}-( \frac{b}{2a} )^2=0$

the next thing to do is collect the first three terms and write them as the square of a binomial, and also collect the last two terms, writing each of them with a denominator equal to 4a^2

We have:

$(x+\frac{b}{2a} )^2+( \frac{4ac}{4a^2}-\frac{b^2}{4a^2} )=0$ .

Then, we take $( \frac{4ac}{4a^2}-\frac{b^2}{4a^2} )$ to the right side and write these two terms as one:

$(x+\frac{b}{2a} )^2=\frac{b^2-4ac}{4a^2}$ .

Next, we take the square root of both sides, which has been shown in the solution.

Next, we have to take b/2a to the right hand side as -(b/2a), and removing the square in the denominator of the right hand side expression:

$x=-\frac{b}{2a}\pm \frac{\sqrt{b^2-4ac}}{2a}}$ .

Answer: the steps to complete in the boxes are :

$(x+\frac{b}{2a} )^2+( \frac{4ac}{4a^2}-\frac{b^2}{4a^2} )=0$ .

$(x+\frac{b}{2a} )^2=\frac{b^2-4ac}{4a^2}$ .

$x=-\frac{b}{2a}\pm \frac{\sqrt{b^2-4ac}}{2a}}$ .

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4 years ago

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The liter is dependent and how much u drink is independent

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