SOLUTION: Sally took four tests in science class. On each successive test, her score improved by 3 points. If her mean score was 69.5%, what did she score on the first test?

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Question 107318This question is from textbook College Algebra
: Sally took four tests in science class. On each successive test, her score improved by 3 points. If her mean score was 69.5%, what did she score on the first test? This question is from textbook College Algebra

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
First test : G
Second test : G+3
Third test : G+6
Fourth test : G+9
%28G%2B%28G%2B3%29%2B%28G%2B6%29%2B%28G%2B9%29%29%2F4=69.5
G%2B%28G%2B3%29%2B%28G%2B6%29%2B%28G%2B9%29=4%2A69.5
4G%2B18=278
4G=260
G=65
Check your answer.
First test : 65
Second test : 68
Third test : 71
Fourth test : 74
%2865%2B68%2B71%2B74%29%2F4=69.5
278%2F4=69.5
69.5=69.5
True statement.
Good answer.
She scored a 65 on the first test.