detkitten

If you got that answer, you probably handled the sum correctly.

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A quick question: does the variable \(i\) represent the imaginary number whose square is \(-1\), or is it simply a variable?

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I think that the answer is \(\dfrac{9}{10}\)

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For the third question, the answer is the third from the top: "The number generator is not fair. In most of the experiments, considerably less than 40% of the selected are green."

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Worked out how to do it myself - sorry for any inconvenience.

To solve this problem, we need to get x+y expressed in an inequality so we can work out the maximum possible value. In order to do that, we need \(x\&y\) to have an equal coefficient.

Let's multiply the first inequality by 2: \((-3\le7x+2y\le3)\times2=-6\le14x+4y\le3.\)

Now we need to multiply the second inequality by 5: \((-24\le y-x\le4)\times5=-20\le5y-5x\le20.\)

Now we can add both inequalities. Note that we can only do this if the signs on the inequalities are the same, but, since they are, we are all good.

\((-20\le5y-5x\le20)+(-6\le14x+4y\le3)=-26\le9x+9y\le26.\)

Now we can isolate x+y by dividing the expression by 9: \((-26\le9x+9y\le26)\times9=-\dfrac{26}{9}\le x+y\le\dfrac{26}{9}.\)

Since the highest value of the inequality is \(\dfrac{26}{9}\), the maximum possible value of x+y is \(\dfrac{26}{9}.\)

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For the second question:

A sample is a subset of people, items, or events from a larger population that you collect and analyze to make inferences.

Therefore, the correct answer is the first answer from the top.

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What is the point of this post?

I don't think that it is possible to drag the sliders on a photograph...

Thanks!

Work is using a force to move an object a distance (when both the force and the motion of the object are in the same direction).

The answer would be c), since you are using a force to move the baseball bat a distance.

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Thanks! ᐠ｡ꞈ｡ᐟ✿\

I thought this was a math help/chat site...

If you need help with these kinds of problems, mabye look in a textbook or ask a teacher/supervisor.