Question 639527
For the question below, first write the equation or inequality in the first blank, then perform the calculation and record your answer in the second blank.

Your current grades in Algebra I are 74, 88, 87 and 83. What grade do you need on the next test to raise your averag to at least 85?

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Since there are already 4 grades, then a total of 5 grades will be used to determine the final average grade.


As the child requires an average of 85, s/he needs to get a total of at least 425 (85 * 5) points


The child has already received a total of 332 (74 + 88 + 87 + 83) points, but would like to acquire at least 425 points 


Let's make the final grade the child needs be F


We now have: 332 + F = 425


F, or final grade needed is AT LEAST 93 (425 - 332)


Inequality in the first blank is: {{{highlight_green((74 + 88 + 87 + 83 + F)/5 >= 85)}}}, or {{{(332 + F)/5 >= 85}}}


{{{332 + F >= 425}}} ---- Cross-multiplying


{{{F >= 425 - 332}}}


Answer in the 2nd blank is: {{{highlight_green(F >= 93)}}}


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