Can u help me with this?

3 ⤊

Can u help me with this?

Nina recieved grades of 85,87,92,70,and 79 on 5 unit tests.the final test is worth 3X as much as one unit test.What must Nina get on her final to average 85 on all her tests.

2007-11-07 09:47:58 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help

3 answers

85+87+92+70+79=413

To get a 85 and your final exam is worth 3x the unit tests then
multiply 85 x8=680-413=267/3 = 89

89% in the final would give you an 85 average

2007-11-07 09:56:14 · answer #1 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋

89 , because
85+87+92+70+79+3X=85(8)
3X=267
X=89

2007-11-07 17:53:34 · answer #2 · answered by daniel f 2 · 2⤊ 0⤋

Whew...too much thinking!..Whoa!..I think I just discovered time travel!..Great Scott!, Marty get the Delorian!

2007-11-07 18:02:13 · answer #3 · answered by chris j 7 · 1⤊ 0⤋