For the math lovers out there...?

Question

I'm trying to figure out my average for my class...please help!! I'd also appreciate if you could tell me how you did instead of just the answer, so I know if I'm ever in this situation again.

40% of my grade= 101
30% of my grade= 94
15% of my grade= 80

I have one more paper due, it's 15% of my grade as well....what's the lowest I can get on it and still get an A?

Thanks so much for your help!!!

Answer 1

My solution assumes you need at least 90% for an A. If your teacher's grade scale is different, you'll have to change the 90 below in the equation, though it would be solved the same way:

.4(101) + .3(94) + .15(80) + .15x = 90
40.4 + 28.2 + 12 + .15x = 90
80.6 + .15x = 90
.15x = 9.4
x = 9.4 / .15 = 62 2/3

You'll need a 63 or better to get a 90% A.

Answer 2

Assuming that an A starts at 90%, the equation you would use is:

(40% of 101) + (30% of 94) + (15% of 80) + (15% of X) = 90,

where X represents your paper score.

(.40*101) + (.30*94) + (.15*80) + (.15*X) = 90

40.4 + 28.2 + 12 + .15X = 90

80.6 + .15X = 90

.15X = 9.4

X = 62.67

So you need at least a 63% (or a D) on the paper to get an A for the course. Unless you really screw up the paper, you're sure to get an A. You go girl!

P.S. If an A does not start at 90, just replace 90 with whatever number is appropriate and solve the same way.

Answer 3

you would have to get at least a 96 ( assuming you need to get a 95 for the class to get an A)

Calculations:
1) .04 * 101 = 4.04 ( for the 40% of my grade= 101)
2.) .03 * 94 = 2.82 (for the 30% of my grade= 94)
3.) .015 * 80 = 1.2 ( for the 15% of my grade= 80)

you add these up 4.04 + 2.82 + 1.2 = 8.06

that means at this point you have a 80.6 ( your just move the decmal over one place)

to get a 95 ( i think thats what you need for and A) you subtract 8.06 - 9.5 = 1.44
so you find x in this equation .015 * x = 1.44 ( like how i did it above for the first three grades)
so, 1.44/ .015 = 96

feel free to email me if you have any questions

Answer 4

depends on how well your classmates do.

your weighted average score is
0.4*101 + 0.3*94 + 0.15*80 + 0.15*

and that weighted average has to be in top 33% of the class to get an A (assuming the curve means equal number of A's, B's and C's), or some other cutoff.

and that "33% of the class" depends on how well everybody else does.

so get off Y!Answers and try to do your best on that paper.

Answer 5

What is minimum you need for an "A" - 90? 95?

For this, assume 90 is what you need.
solve for X - your last paper.
(0.40 x 101) + (0.30 x 94) + (0.15 x 80) + (0.15 x X) = 90
Doing the math:
40.4 + 28.2 + 12.0 +.15X = 90
80.6 + .15X = 90
Subtract 80.6 form both sides:
.15X = 9.4
Divide both sides by 0.15:
X = 62.6 (approx) - say 63.

So if 90 is an "A", you need 63 on your last paper.

Answer 6

let assume your A grade is 90 then
(0.4 x 101) + (0.3 x 94) + (0.15 x 80) + (0.15 x paper grade) = 90
40.4 + 28.2 + 12 + 0.15 x paper grade = 90
80.6 + 0.15 x paper grade = 90
0.15 x paper grade = 90 - 80.6 = 9.4
paper grade = 9.4 / 0.15 = 62.7

so in order to get A you must get 62.7 grade on your paper

Answer 7

It's broken down into 100% so...

101(0.40) + 94(0.30) + 80(0.15) + ??(0.15) = ...

Just substitute your final score...or insert 0 for the ?? to determine the lowest score you can get.