C + 2c + 12 = 75
Combine like terms:
3c + 12 = 75
Subtract 12 to both sides:
3c = 63
Divide 3 to both sides:
c = 21
1 = 0.30
2 = 0.43
3 = 0.56
4 = 0.69
5 = 0.82
6= 0.95
To find by how much you are adding every time , you have to subtract the 2 magnet cost (0.43) from the 1 magnet cost (0.30) and this equals 0.13
3.225
to check just find 10% of 21.50 (2.15) and 5% of 21.50(1.075)
Answer:
hmm i think its d or c but not rly suree
I got 58.32 or 6.36 i'm not to sure if these is the right answer but if you can compare your answer to my answer maybe you can find a difference and sue it to find another answer.
