SOLUTION: I need assistance on the following problem: Rod's quiz grades are 73, 75, 89, & 91. What scores on a fifth quiz will make his average quiz grade at least 85? Translate to an equa

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Question 28373: I need assistance on the following problem: Rod's quiz grades are 73, 75, 89, & 91. What scores on a fifth quiz will make his average quiz grade at least 85? Translate to an equality. I came up with:
X + 73 + 75 + 89 + 91 = greater then 85
X + 328 = greater then 85
???????????
X = 97
Thanking you in advance.

Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
I need assistance on the following problem: Rod's quiz grades are 73, 75, 89, & 91. What scores on a fifth quiz will make his average quiz grade at least 85? Translate to an equality. I came up with:
X + 73 + 75 + 89 + 91 = greater then 85
NO NOT EQUAL TO 85 BUT 85*5=425..SINCE 85 IS AVERAGE SCORE TOTAL MARKS IN 5 TESTS IS 5*AVERAGE
X + 328 >=425
X>=425-328=97 IS THE ANSWER
greater then 85
???????????
X = 97