At Smarties Middle school, students must receive a grade of at least 70 to pass a class. Waleed's math teacher, Mrs. Goody, plans to base her students on a total of 5 tests this 6-week period. Her students have already taken four of these tests. Waleed, who has made Mrs. Goody for his 6-period class, has made these scores: 75, 82, 74, and 85. Whcih equationcan Micheal use to find the minimum score(s) he must get on the 5th test in order to receive a passing grade this 6 weeks?
2007-03-08 12:39:50 · 3 answers · asked by Julie J 1 in Science & Mathematics ➔ Mathematics
(75 + 82 + 74 + 85 + n)/5 = 70
2007-03-08 12:43:02 · answer #1 · answered by ecolink 7 · 0⤊ 0⤋
(75+82+74+85+ x) /5 = 70
(316 +x)/5 =70
multiply 5 to both sides of equation to get rid of the divide by 5 part
316+x = 350
subtract 316 from both sides
x=34
2007-03-08 12:47:25 · answer #2 · answered by monkeygirla 2 · 0⤊ 0⤋
Let x=one test.
(75+82+74+85+x) /5 = 70
75+82+74+85+x = 350
x= 350 - 316
x = 32
He will have to get at least a 32.
Hope this helps!
2007-03-08 12:45:59 · answer #3 · answered by Waterfall 3 · 0⤊ 0⤋