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49% of what number means 49% multiplied by a number. You probably want to replace ‘a number’ with a single letter variable. And it’s also probably convenient to convert the percentage into a …

We went through the midterm test. A few concepts were missing in his approach, like absolute value and a mistake with adding negative numbers. Spent a bit of time on changing fractions by …

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You can replace something with something that is exactly equal to it. In this case, within the square root by factoring the 12. Here is some work you could do. If you saw a later step, you …

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Here's a related problem. You use the same pattern for x. …

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Basically, you’re trying to get to a statement that has y = where you only see the y by itself on one side of the equals sign. You can think about the two sides of the equals sign as being separated …

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