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Problem 21

Explain why the lower vapor pressure for a soluti…

Johns Hopkins University

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Problem 20

What is the sum of the solutions to
$(x-6)(x+0.7)=0 ?$
$$\begin{array}{l}{\text { A } )-6.7} \\ {\text { B) }-5.3} \\ {\text { C) } 5.3} \\ {\text { D) } 6.7}\end{array}$$

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SAT Practice Test # 6



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Video Transcript

Okay, so for this one, this one maybe deal with with some terminology here. So we want to know that some of the solution well, some means we have to add and solutions are the roots basically well in this form, we have the factors. So each one of those things inside the parentheses, that's a factor where a factor is written as X minus a route. So then, if we want to add the routes, we have to First I say the roots, which are six and negatives your point seven because again, it's going to be in the form of X minus R. So if we did explosive your point seven instead of minus, we had a flip the sign too negative. So if we want to add those, we do six. Plus, Knight is your point seven, Which is this gonna be five point three? Soc is our answer

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