On his first three tests, kurt scored 75,82 and 84. What must his score be on the fourth test for his mean score to be 85?
46
24
99
109?
which one?
Find the difference: 09 - 0.25
-0.75
0.16
0.65
0.75
How many 1/2-inches stripes of ribbon can be cut froma piece of 7 inches long?
3 1/2
6 1/2
7 1/2
14
If a nickel, a dime, and a quarter are flipped at one time, how outcomes are possible?
4
6
8
24?
2007-07-28 11:26:29 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Sorry too much work! that's not HWH it AH
2007-07-28 11:35:50 · answer #1 · answered by LucySD 7 · 1⤊ 0⤋
For the first question: your mean score is 85 which you would get by first adding up all the test scores (even though you don't know one) and then dividing by the number of tests, 4. Let's call the unknown test score Z. The sum of the test scores is (75+82+84+Z). Divding this by 4, which is the number of tests, gives you the average score 85. So we can write this relationship as an equation. (75+82+84+Z)/4 = 85. Mulitiply both sides of the equation by 4 and then isolate the variable, so that it is alone on one side of the equation. This will give you your answer.
2007-07-28 11:41:34 · answer #2 · answered by Doug 2 · 2⤊ 0⤋
On the second question, there must be a misprint. The 09 would not give answers that fit.the given.ones. .09 would , tho.
On the last question, you didn't state whether positions count in the outcome.
2007-07-28 11:38:32 · answer #3 · answered by skwonripken 6 · 2⤊ 0⤋
2. 0.65
3. 14
2007-07-28 15:40:02 · answer #4 · answered by angel5321 1 · 1⤊ 0⤋