In a certain math class, there is a total of 600 possible points from 4 tests. Beth made a 96, 110, and 100 on her first 3 math tests. Each test is worth 150 points To get at least a C, the total points must be at least must be at least 420. What has to be the score on the last test to get at least a C?A. If x is her fourth exam score, write the equation for her numerical grade.B. Set up and solve an inequality to solve this problem as shown in the videos.

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A: We first replace f(x) by y. Then we switch x and y. And then solve for y. This new y is replaced by ...

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A: The given functions are

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